I drilled a few bodies with a 43 drill bit and ran 93 axles. I found the axle holes to be really tight so I used a spare 93 axle (one that I ruined) and inserted several times to loosen up a bit. It was still real tight but I was able to get them inserted. Is anyone using a larger drill bit to open up the holws? Maybe this is where tuning grooves would have come in handy!