I cleaned it by soaking in Home Depot naptha and pegging by hand, 2 rinses. Demagnetized the whole thing, as well. I'll dig back in with both suggestions and report back any findings.
Enjoying the process.
Always hard so make a guess... Anyway, I think the problem is on the dial side, i.e. the dial train (cannon pinion, minute wheel, hour wheel, intermediate wheel). Could it be that the clutch wheel doesn't disengage properly from the intermediate wheel that drives the minute wheel when you set the time? If so the intermediate wheel may bind up the minute wheel making things slow down and then stop. Well, just guessing. Anyway, I'd check the dial train (motion works) and the keyless works. I think your idea of removing the cannon pinion to see if it solves the problem is a good idea. If it doesn't help you'll know for sure the problem is with the train of wheels or the escapement.
Good luck and let us know of any progress or any new observations.
Hi The difficult bit is removing the staff without bending the balance rim hence the use of the Platax tool and the K&D tools to hold the balance flat. Some watch makers put the broken balance in a lathe and cut the rivit off, which is a skilled job so as not to mess up the balance hub. I have in the past done it using a stake and a set of punches and was succesfull. The K&D tools come up on the bay from time to time as do Platax tools who command a price greater than £250 the K&K s go for arround the £50 mark. I would reccomend that before embarking on this journey that you watch Mark our Hosts videos on UTube and then decide on the course of action to take. Hope all this is useful for you. cheers