I'll cut a couple of 6 mm wide sims and put them in the bottom of the route and check it before I cut the real ones. The rock maple sheet I have is about A4 size so I have plenty.

I ususally clamp the neck in and lay the long straight edge between the nut and the bridge. But building three juniors I sort of missed a step twice(oops).
I also had to steam the neck off the Yellow Junior. That was a toss up between rebate the bridge pins or steam it off. As I was already playing steam operator I went with that option. While that one was relatively easy to steam off I applied too much pressure on the neck and cracked the heal. It's nothing a couple of pieces of 6mm dowel can't fix. The Yellow junior wasn't as bad as the Gypsy. With the gypsy if I went with the rebating of the bridge pins I would have needed to rebate a mm of the bridge itself, and I just didn't think that was a good idea.

Cheers PK