@Johnbeere posted:I think the issue with using standard Lionel axles is that there isn't an easy way to adapt from Lego to those axles - maybe a bushing with the right inner and outer diameter could work.
That's my overall idea, but all the axle sets I had ready access to are needle point style ends. Based on this thread though, I need to dig through my parts and see if I can find something in the parts bin that I can rob, or acquire axle sets elsewhere. The bushings will need to be custom.