UG 218.2 - Mainspring Issue

[mzinski]

Well it looks like the arbor doesn't solve the problem. Still plenty of sideshake. 

I'd like to try my hand at replacing the bushings with jewels. I'm going this route because 1. watch supply stores don't seem to sell the bushing and 2. I don't have a lathe. I'm basically at the point that I can try this because the next option is replacing the main plate and barrel bridge. So if I mess up the jewel replacement, I'm where I would be anyways. 

I measured the arbor: 

Top Pinion is 0.70mm

Bottom Pinion is 0.80mm

The bushings are still installed but measuring them on the main plate and barrel bridge comes up with: 

Barrel Bridge Bushing: ID: 0.80mm OD: 1.20mm

Main Plate Bushing: ID 0.90mm OD 1.80mm

It looks like I can get Seitz Center Jewels 30714 in sizes that will fit these measurements. Question is, how much space should I have for the arbor? For example, if the measurement is 0.70mm, do I get 76, 78, 80? 

Please let me know if you have any recommendations on this. TIA! 

[mzinski]

Long silence but I’ve finally gone and picked up a couple of jewels and replaced both brass bushings with the appropriately sized jewels. I may have a little bit of end shake adjustments to make but this has certainly helped the situation. Tweaking and testing now - hopefully this will solve the issue for good. 
Thanks for all of the help and advice! You’ve helped me level up my watch making skill set. 
Oh, with the added jewels, should I scratch out the “17-jewels” engraving and scratch in “19”?