Im not a beginner,but I would like to offer to those that are building a wing(flat bottom or semi) from a kit. First off, you know you need a flat table. (#2) When gluing your wing ribs of your spar,Dont Force them on, use a razor blade,take your time, trim till they fall in place with no resistance,then glue. The same with the trailing edge, Dont move the back of the rib to fit on the trailing edge,just glue the trailing edge on as is,and trim later. The same with the leading edge, Just glue the leading edge on and trim later. This will give you the airfoil your looking for. I hope this will help anyone who is building a wing. Thankyou

I concur, don't force it, trim later.

Excellent advice.