Very, very nice Dave!
I wonder if there are any playstation specific single handle flight sticks that you could do the same with? Those twin sticks are a bit hard to come by.
Where did you get the baking plastic from?
For whoever asked about getting this to work with the dreamcast, just buy a $10 controller adapter. IMO any console controls should be hacked to psx dual shock; you can get cheap converters to use them on a pc, xbox, gamecube, n64, you name it and there's a PSX adpater for it.