JJ:
I personally checked the bits I shipped you to make sure that they would bore deep holes. I rejected one that wouldn't and it is being restored by improving the lead screw threads. Maybe yours needs the same improvement. I don't know for sure.
I thought I picked out a good one for you.
If you are unhappy with it you can return it for an exchange.

Quote:
Can the mortises of the braces going in the opposite direction be stacked right on top of the others?


I'm not sure if I understand this question.

Jim Rogers


Whatever you do, have fun doing it!