DDK - Die Deutschen Klassiker

I ended up getting the Stomski circlip tool for my Wossners, as it was all but impossible to do by hand as you could on the std full sized pistons

I copied the idea and made one on my old lathe, excellent tool!

One thought, Graham, take care that you have a bit of the circlip exposed at the circlip removal indent, so you can access them when you want to remove the pistons in future. As the circlip tool is a “Blind” fitment, I discovered a couple of mine had the gap at the indent and they are a devil to try and rotate while the position is still on the rod

Yes, understand mike, ensure the piston grove gap is covered by the wire clip otherwise you need a lot of new swear words to prise the clip out.
Lots of piston clearance and gapping checks today...