Model Trolley 4 wheel 00 / 009 scale railway

thingiverse

This is ridiculously small. It printed at 01.mm, leaving much to be desired in terms of size. The printed model depicted could be vastly improved upon with some serious cleanup work. Unfortunately, the axles failed to print properly. To address this issue, I used 0.4mm steel wire for the axles - specifically, an electric guitar string - and carefully pushed them through the wheels and 'bearings while gently heating them with a soldering iron.