here are some tools ive been working on and cheating on making the the fullers but they wotk great and very cost effective . The only problem ive had while doing these rounding hammers is getting the drift stuck and whether i upset in the cupping tool or not sometimes it seems its almost forge welded in the hammer. ive used anti seize and coal dust . could anybody chime in should i make 3 or so drifts for a single hammer i have two and still seems like it occurs.