Finally got around to sorting out an enclosure for my ACA500+. Took inspiration from the mod I saw on the forums here.
I positioned the side cuts so that the enclosure doesn't block the joystick port. No rear cuts - tried to minimize any cutting of the 1010 enclosure. So far, its working great, and I like keeping the original look!
FYI, the ACA500+ is working perfectly on my A1000, and another one I tried it out on.
I had some trouble initially, but after cleaning the edge connector thoroughly with IPA and an ear bud, I haven't had a hiccup. Its amazing how much dirt came off those things, even when it looked clean!
There's enough room to comfortably use both joystick ports. Does not look that way in the first pic, as the front cover of the enclosure is leaning forward at an angle:
You can see the amount of room here:
All closed up, it looks stock :