diff --git a/mods/cars/welding.lua b/mods/cars/welding.lua
index d30aa813..e07ccc63 100644
--- a/mods/cars/welding.lua
+++ b/mods/cars/welding.lua
@@ -53,6 +53,10 @@ local welderdef = {
 											minetest.chat_send_player(name, "Only Police CEO and those with 'give' priv can make police cars.")
 											return
 										end
+										if class_get and not class_get(name, "machinist") and carname ~= "cars:police_sedan" then
+											minetest.chat_send_player(name, "Only machinists can craft cars")
+											return
+										end
 										worldedit.set(vector.subtract(nodepos, offset), vector.add(vector.subtract(nodepos, offset), size), "air")
 										local ent = minetest.add_entity(vector.add(vector.subtract(nodepos, offset), vector.multiply(size, .5)), carname, user:get_player_name())
 										ent:setyaw(minetest.dir_to_yaw(minetest.facedir_to_dir(node.param2))-math.pi)
@@ -68,6 +72,10 @@ local welderdef = {
 				local obj = pointed_thing.ref
 				if not obj or not obj:get_armor_groups().vehicle then return itemstack end
 				if obj:get_hp() >= obj:get_properties().hp_max then return itemstack end--todo add reassembling repair and only allow welding for hp above 50%
+				if class_get and not class_get(name, "machinist") and obj:get_hp() >= obj:get_properties().hp_max/2 then--only allow machinist to completly repair cars.
+					minetest.chat_send_player(name, "Only machinists can repair cars above 50%")
+					return
+				end
 				if default.player_attached[name] then return itemstack end
 				if cooldowns[name] then return itemstack end
 				
diff --git a/mods/farming/init.lua b/mods/farming/init.lua
index c3037508..c3f65f24 100644
--- a/mods/farming/init.lua
+++ b/mods/farming/init.lua
@@ -79,7 +79,7 @@ end
 
 
 -- Growth Logic
-local STAGE_LENGTH_AVG = 72000
+local STAGE_LENGTH_AVG = 57600
 local STAGE_LENGTH_AVG_ORIGINAL = STAGE_LENGTH_AVG
 local STAGE_LENGTH_DEV = STAGE_LENGTH_AVG*.8
 function farming_setspeed(factor)
@@ -468,7 +468,7 @@ end
 
 -- Place Seeds on Soil
 function farming.place_seed(itemstack, placer, pointed_thing, plantname)
-
+	if class_get and placer and player:get_player_name() and not class_get(player:get_player_name(), "farmer") then return end
 	local pt = pointed_thing
 
 	-- check if pointing at a node
diff --git a/mods/hbhunger/hunger.lua b/mods/hbhunger/hunger.lua
index 0955cff3..be64421a 100644
--- a/mods/hbhunger/hunger.lua
+++ b/mods/hbhunger/hunger.lua
@@ -466,7 +466,13 @@ function hbhunger.handle_node_actions(pos, oldnode, player, ext)
 		new = hbhunger.EXHAUST_MOVE
 	end
 	exhaus = exhaus + new
-	if exhaus > hbhunger.EXHAUST_LVL then
+	local exhaus_lvl
+	if class_get and class_get(name, "unclassed") then
+		exhaus_lvl = hbhunger.EXHAUST_LVL*1.5
+	else
+		exhaus_lvl = hbhunger.EXHAUST_LVL
+	end
+	if exhaus > exhaus_lvl then
 		exhaus = 0
 		local h = tonumber(hbhunger.hunger[name])
 		h = h - 1
diff --git a/mods/hbhunger/init.lua b/mods/hbhunger/init.lua
index 2cc4808c..758bd2c6 100644
--- a/mods/hbhunger/init.lua
+++ b/mods/hbhunger/init.lua
@@ -127,7 +127,11 @@ minetest.register_globalstep(function(dtime)
 			-- lower satiation by 1 point after xx seconds
 			if timer2 > hbhunger.HUNGER_TICK then
 				if h > 0 then
-					h = h-1
+					if class_get and class_get(name, "unclassed") then
+						h = h-.75
+					else
+						h = h-1
+					end
 					hbhunger.hunger[name] = h
 					hbhunger.set_hunger_raw(player)
 				end
diff --git a/mods/lockpicks/init.lua b/mods/lockpicks/init.lua
index e2183cf9..524529eb 100644
--- a/mods/lockpicks/init.lua
+++ b/mods/lockpicks/init.lua
@@ -98,6 +98,9 @@ local newchestrightclick = function(pos, node, clicker, itemstack, pointed_thing
 	and not (def and def.tool_capabilities and def.tool_capabilities.groupcaps and def.tool_capabilities.groupcaps.locked) then
 		return itemstack
 	end
+	if class_get and not default.can_interact_with_node(clicker, pos) and not class_get(clicker:get_player_name(), "snooper") then
+		return itemstack
+	end
 	name = "default:chest_locked"
 	sound_open = "default_chest_open"
 	sound_close = "default_chest_close"
diff --git a/mods/mobs_redo/api.lua b/mods/mobs_redo/api.lua
index dcddeb58..6ee32525 100644
--- a/mods/mobs_redo/api.lua
+++ b/mods/mobs_redo/api.lua
@@ -4755,7 +4755,7 @@ function mobs:feed_tame(self, clicker, feed_count, breed, tame)
 
 			self._breed_countdown = nil
 
-			if breed and self.hornytimer == 0 then
+			if breed and self.hornytimer == 0 and (not class_get or class_get(clicker:get_player_name(), "farmer")) then
 				self.horny = true
 				self.food = 4
 			end
diff --git a/mods/playertools/init.lua b/mods/playertools/init.lua
index afcd7a13..fa32cf1b 100644
--- a/mods/playertools/init.lua
+++ b/mods/playertools/init.lua
@@ -240,6 +240,9 @@ minetest.register_chatcommand("grief_check", {
 		if not minetest.setting_getbool("enable_rollback_recording") then
 			return false, "Rollback functions are disabled."
 		end
+		if class_get and not class_get(clicker:get_player_name(), "snooper") then
+			return false, "Only snooper class can grief check"
+		end
 		local range, hours, limit =
 			param:match("(%d+) *(%d*) *(%d*)")
 		range = tonumber(range) or 0