Nice mod. I've been wanting to do the same with my wheel axles. Does that pin go all the way through both sides?
Yep, the pin goes all the way through both sides of the shelf. The other end of the pin just has a flat head on it.
I'm getting ready to do something like that to my axle to. I think I'm going to cut the axle down so it just barely sticks out past the wheels. Then drill a hole in each end of the axle on my lathe and tap them to 1/4-20 threads. Then I'll use a stainless bolt and washer to hold the wheels on. I don't like all the slop in the wheels on my performer.
I have the day off, maybe I'll do the axle and post pics tonight.