Couple of changes. Starting on the point bank.

code/game/objects/items/robot/robot_items.dm

@@ -886,5 +886,6 @@
 
 /obj/item/card/id/miningborg
 	name = "mining point card"
+	desc = "A robotic ID strip used for claiming and transferring mining points. Must be held in an active slot to transfer points."
 	access = list(ACCESS_MINING, ACCESS_MINING_STATION, ACCESS_MAILSORTING, ACCESS_MINERAL_STOREROOM)
 	icon_state = "data_1"

code/game/turfs/simulated/minerals.dm

@@ -63,9 +63,10 @@
 		to_chat(user, "<span class='notice'>You start picking...</span>")
 
 		if(I.use_tool(src, user, 40, volume=50))
+			var/range = I.digrange //Store the current digrange so people don't cheese digspeed swapping for faster mining
 			if(ismineralturf(src))
 				if(I.digrange > 0)
-					for(var/turf/closed/mineral/M in range(user,I.digrange))
+					for(var/turf/closed/mineral/M in range(user,range))
 						if(get_dir(user,M)&user.dir)
 							M.gets_drilled()
 				to_chat(user, "<span class='notice'>You finish cutting into the rock.</span>")