I know Kohler makes .010 undersize rods I have not heard of inserts and am not familiar with them, is ths something Kohler has ? The problem with my crank is wear on the main bearing area. Still looking for a used crank don't want to spend $1000.00 for one, might try spray welding the crank and getting it turned back to spec if that isn't cost prohibitive. Never tried it before but I don't see why it wouldn't work unless someone out there does. Used Crank anyone ????