Sumner posted a thread in the 3d printing au forum. A simple wedge tool that I use to widen the wheel gauge when necessary. Getting the gauge narrowed I just do by hand. Dunno how to link to the thread, but the title is... "3D Printed Angle Blocks to Separate Wheels/Axles from Loco Center Gears...." Edit: Right, by the time I wrote this, Sumner went and posted his solution!
Guys, I emailed Fohrman in Germany and they have not US distributor. I have asked if they ship to the USA. DMK