I figured out the dial spacer, there are indents inside that fit over the dial pins and then sit down against the back of the dial. Unfortunately my spacer seems to have developed some slight distortion, it won't sit flush on a flat surface but wobbles. How that happened I can't say but I have bought another to replace it. I did machine a 'dummy' as you call it, and it did work, helped keep the pins pretty straight and aligned enough to sit in the movement, unfortunately one of the dial feet popped out when I was experimenting so I have bought some better glue to attach them with. You are right about machining the recesses flush (mine are just about there, could be a tad deeper), and also when you glue some escapes and you have to remove that also. I'm getting there.