Hi Tom,
turning the collet just gets it in beat doesn’t it?, do you have to shorten or lengthen the hairspring in the stud?
Keep at it, the more you do the easier it gets, the biggest problem I had when doing wristwatches was knowing which screw went where. I soon learn’t my lesson and now keep the screws with the parts in the watch cleaning baskets. The other thing that always causes me problems are the levers and springs, I always manage to get something back wrong and have to do it again 
Paul.
