Leaderboard

I missed this earlier. The dial isn't going into the holder, it should sit proud of it. This is what I am currently using which I print for each different movement.

I discovered this last night when I printed my model, I'll try and tweak the design a little and re-post here

That's very observant of you, Nev & that the 4th wheel is from another movement & has been dished to fit does seem a more likely explanation. Thanks for the education re calculating the rate & spring frequency. In the meantime, spurred by your earlier comnent, I risked a further tinker with the balance spring, cleaning it, fully un-kinking the last few cms (I'd been worried about breaking it first time round) & pinning it at the very end. The clock now seems to be running slow when the regulator is in that position so some progress at last.....Many thanks, once again!

That's a good idea - shrinking down the nut and wrench size from the old casebook trick!

I didn't think pulling to set position would work harden the spring, in that position it is stressed where the arm starts. By work hardening i meant rapid polishing at that point, a bit like polishing a pivot work hardens as it compresses the steel. I doubt polishing by hand would achieve much in that respect though. Its finished, arm polished up mostly at the join to the bridge's main body. I'm ok with it, the screw holes aren't great as i had to open them up by redrilling and positioning it was difficult, I'm not much use with a loupe, opening up with a file might be a better option for me or i could just use the correct drill size . And the detent is way too deep, i had to guess that with the stem release out of position and sat on top, but i only took one measure and went for it, no slowly slowly catch your monkey . First go I'm happy , well sort of, it works and thats a big thing for me, next one will have a bit more finesse. Anyone thats interested, after filing, i used a 2000 grade home made diamond micro file and then 20 micron film, the film is much better than wet and dry, more stable to use and doesn't shed cheap grade grit everywhere , then auto polish on a sponge pad.

Glue a nut to the barrel lid, insert a bolt, pull, disolve the glue. Maybe someone will have a better answer.

I printed the base and it is a bit too large to fit on the base of the hand setter. The ring bumps into the column so it is unable to full seat on the central ring. I'm going to try removing some of the materal and see if I can't get it to go down.