After glueing on your leading edge ply, do not assume it will be nice and flat even tho it looks like it is. Lightly sand the whole leading edge by using a 4ft piece of angle iron with 1" sanding belt tacked to it with double sided tape. You will find 'high spots'...
While we are on the subject of tips and gotchas...we don't seem to have many of them in the list considering the vast amount of knowledge some of you guys have. Come on chaps, disseminate your wisdom!