How do I avoid having my joystick mounting screws showing through the top of the CP?
As mentioned in the new FAQ, Tee nuts or threaded inserts. 
Scott
Thanks Scott - I'm off to look for some inserts.
I had a bad day building the CP today. OND's plans use a slanted CP (back higher than the front) which looks cool, but trying to get a 5 deg angle on the edges of the front and back to handle the slope was a nightmare!
Second issue:
I'm going to bottom-mount my joysticks into a rebate to raise them up a little, I also think it will offer more stability to the sticks over time. However, I'm not sure which bits of the stick go on top of the panel and which bits go underneath. It would seem I can't get away with a flush rebate with a simple hole for the shaft in the middle, I'm going to have to cut a large countersink-shaped dent to accommodate the "thingy"

Here's a stick broken down (there's also a little circlip to keep it all together (not pictured):

3- Clearly the rubber centering washer and that fits into the recess in the base
6 - Clearly a dust washer and that goes on the top side of the panel.
4 & 5 have me a bit baffled though.
The widest part of 4 slots into the rebate in the base
5 slides right up against the black bottom of the knob
Do I need to cut a countersink for 4 & 5 into the underside of my CP to get the base to sit flush in its rebate on the underside of the CP?
I ran into anther issue trying to mount my joystick today.