diff --git a/mods/itemframes/init.lua b/mods/itemframes/init.lua
index 3bc04b25..55b28af1 100644
--- a/mods/itemframes/init.lua
+++ b/mods/itemframes/init.lua
@@ -99,7 +99,7 @@ minetest.register_node("itemframes:frame",{
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
-	groups = { choppy=2,dig_immediate=2,deco_block=1},
+	groups = { dig_immediate=3,deco_block=1},
 	sounds = mcl_core.node_sound_defaults(),
 	after_place_node = function(pos, placer, itemstack)
 		local meta = minetest.get_meta(pos)
diff --git a/mods/mcl_core/nodes.lua b/mods/mcl_core/nodes.lua
index d4c92ff6..405b2fd3 100644
--- a/mods/mcl_core/nodes.lua
+++ b/mods/mcl_core/nodes.lua
@@ -1021,7 +1021,7 @@ minetest.register_node("mcl_core:slimeblock", {
 	stack_max = 64,
 	-- According to Minecraft Wiki, bouncing off a slime block from a height off 255 blocks should result in a bounce height of 50 blocks
 	-- bouncy=44 makes the player bounce up to 49.6. This value was chosen by experiment.
-	groups = {oddly_breakable_by_hand=3,dig_immediate=2,bouncy=44,fall_damage_add_percent=-100,deco_block=1},
+	groups = {oddly_breakable_by_hand=3,bouncy=44,fall_damage_add_percent=-100,deco_block=1},
 })
 
 minetest.register_node("mcl_core:glass", {
@@ -1070,7 +1070,7 @@ minetest.register_node("mcl_core:rail", {
                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 	},
 	stack_max = 64,
-	groups = {dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1,dig_by_water=1,transport=1},
+	groups = {cracky=3,oddly_breakable_by_hand=3,attached_node=1,rail=1,connect_to_raillike=1,dig_by_water=1,transport=1},
 })
 
 minetest.register_node("mcl_core:ladder", {
diff --git a/mods/mcl_minecarts/rails.lua b/mods/mcl_minecarts/rails.lua
index 85b98a4f..ca6e85cd 100644
--- a/mods/mcl_minecarts/rails.lua
+++ b/mods/mcl_minecarts/rails.lua
@@ -14,7 +14,7 @@ minetest.register_node("mcl_minecarts:golden_rail", {
 		-- but how to specify the dimensions for curved and sideways rails?
 		fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 	},
-	groups = {dig_immediate = 2, attached_node = 1, rail = 1, connect_to_raillike = 1, dig_by_water = 1, transport = 1},
+	groups = {cracky = 3, oddly_breakable_by_hand = 3, attached_node = 1, rail = 1, connect_to_raillike = 1, dig_by_water = 1, transport = 1},
 	
 	after_place_node = function(pos, placer, itemstack)
 		if not mesecon then
diff --git a/mods/redstone/mesecons_button/init.lua b/mods/redstone/mesecons_button/init.lua
index 76cbd2cd..053ddb7f 100644
--- a/mods/redstone/mesecons_button/init.lua
+++ b/mods/redstone/mesecons_button/init.lua
@@ -36,7 +36,7 @@ minetest.register_node("mesecons_button:button_stone_off", {
 		type = "fixed",	
 		fixed = boxes_off	-- the button itself
 	},
-	groups = {dig_immediate=2, attached_node=1, dig_by_water=1},
+	groups = {cracky=3, attached_node=1, dig_by_water=1},
 	description = "Stone Button",
 	on_rightclick = function (pos, node)
 		mesecon:swap_node(pos, "mesecons_button:button_stone_on")
@@ -67,7 +67,7 @@ minetest.register_node("mesecons_button:button_stone_on", {
 		type = "fixed",	
 		fixed = boxes_on	-- the button itself
 	},
-	groups = {dig_immediate=2, not_in_creative_inventory=1, attached_node=1, dig_by_water=1},
+	groups = {cracky=3, not_in_creative_inventory=1, attached_node=1, dig_by_water=1},
 	drop = 'mesecons_button:button_stone_off',
 	description = "Stone Button",
 	sounds = mcl_core.node_sound_stone_defaults(),
@@ -93,7 +93,7 @@ minetest.register_node("mesecons_button:button_wood_off", {
 		type = "fixed",	
 		fixed = boxes_off	-- the button itself
 	},
-	groups = {dig_immediate=2, attached_node=1, dig_by_water=1},
+	groups = {choppy=3, attached_node=1, dig_by_water=1},
 	description = "Wooden Button",
 	on_rightclick = function (pos, node)
 		mesecon:swap_node(pos, "mesecons_button:button_wood_on")
@@ -124,7 +124,7 @@ minetest.register_node("mesecons_button:button_wood_on", {
 		type = "fixed",	
 		fixed = boxes_on	-- the button itself
 	},
-	groups = {dig_immediate=2, not_in_creative_inventory=1, attached_node=1, dig_by_water=1},
+	groups = {choppy=3, not_in_creative_inventory=1, attached_node=1, dig_by_water=1},
 	drop = 'mesecons_button:button_wood_off',
 	description = "Wooden Button",
 	sounds = mcl_core.node_sound_wood_defaults(),
diff --git a/mods/redstone/mesecons_delayer/init.lua b/mods/redstone/mesecons_delayer/init.lua
index b518a7d1..fed0bdbb 100644
--- a/mods/redstone/mesecons_delayer/init.lua
+++ b/mods/redstone/mesecons_delayer/init.lua
@@ -46,9 +46,9 @@ end
 for i = 1, 4 do
 local groups = {}
 if i == 1 then 
-	groups = {snappy=1,dig_immediate=2,dig_by_water=1}
+	groups = {snappy=1,dig_immediate=3,dig_by_water=1}
 else
-	groups = {snappy=1,dig_immediate=2,dig_by_water=1, not_in_creative_inventory=1}
+	groups = {snappy=1,dig_immediate=3,dig_by_water=1, not_in_creative_inventory=1}
 end
 
 local delaytime
@@ -161,7 +161,7 @@ minetest.register_node("mesecons_delayer:delayer_on_"..tostring(i), {
 		type = "fixed",
 		fixed = boxes
 	},
-	groups = {snappy = 1, dig_immediate = 2, dig_by_water=1, not_in_creative_inventory = 1},
+	groups = {snappy = 1, dig_immediate = 3, dig_by_water=1, not_in_creative_inventory = 1},
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
diff --git a/mods/redstone/mesecons_walllever/init.lua b/mods/redstone/mesecons_walllever/init.lua
index f632810d..9f8c979d 100644
--- a/mods/redstone/mesecons_walllever/init.lua
+++ b/mods/redstone/mesecons_walllever/init.lua
@@ -27,7 +27,7 @@ minetest.register_node("mesecons_walllever:wall_lever_off", {
 		fixed = {{ -2/16, -3/16,  8/16, 2/16, 3/16,  4/16 },	-- the base
 			 { -1/16, -8/16, 7/16, 1/16, 0/16,  5/16 }}	-- the lever itself.
 	},
-	groups = {dig_immediate=2, dig_by_water=1},
+	groups = {oddly_breakable_by_hand=3, dig_by_water=1},
 	is_ground_content = false,
 	description="Lever",
 	on_rightclick = function (pos, node)
@@ -66,7 +66,7 @@ minetest.register_node("mesecons_walllever:wall_lever_on", {
 		fixed = {{ -2/16, -3/16,  8/16, 2/16, 3/16,  4/16 },	-- the base
 			 { -1/16, 0/16, 7/16, 1/16, 8/16,  5/16 }}	-- the lever itself.
 	},
-	groups = {dig_immediate = 2, not_in_creative_inventory = 1, dig_by_water=1},
+	groups = {oddly_breakable_by_hand=3, not_in_creative_inventory = 1, dig_by_water=1},
 	is_ground_content = false,
 	drop = '"mesecons_walllever:wall_lever_off" 1',
 	description="Lever",
diff --git a/mods/signs/init.lua b/mods/signs/init.lua
index fbc39ebd..2fba31d8 100644
--- a/mods/signs/init.lua
+++ b/mods/signs/init.lua
@@ -137,7 +137,7 @@ local signs_yard = {
     {delta = {x = 0.05, y = 0, z = 0}, yaw = math.pi / 2},
 }
 
-local sign_groups = {choppy=2, flammable=1, dig_immediate=2, deco_block=1}
+local sign_groups = {choppy=2, flammable=1, deco_block=1}
 
 local construct_sign = function(pos)
     local meta = minetest.get_meta(pos)