737 Overhead Distance

I have just about finished my Poldragonet 737 overhead. Hope I never see another soldering gun for awhile. Anyway I'm not sure how high the bottom of the overhead should be from the Poldragonet glareshield, or how far in or out (side view) it should be. I am starting to buld the overhead holder but I want the overhead to be in the right position. Any advice and help will be MUCH appreciated. Thanks as always Dave

Perpendicular distance from Glareshield top to overhead lower end is app. 21 cm, the OVHD is almost in line with the glareshield top referring to front-aft axis.

Thanks alot. That really helps. Now the fun begins. Dave