FDS 737 Overhead/MIP Owners - Quick Questions!

Well I am going to take the plunge and get an FDS Overhead and MIP this summer... a little out of my budget, but I am limiting the "damage" by sourcing my own hardware to interface with since it can be had a little cheaper from the suppliers like DigiKey, etc.

Just wondering if you can help me with the following:

1. What is the width of the holes in the OVH/MIP for the momentary push buttons (ie. No Smoking, Gnd Call)?

2. What is the length of the potentiometers used for in the MIP?

Any info is appreciated!

Thanks!