Sorry, I've deleted other posts here so I can give the official reply.
When removing the AX8 feet, we recommend that you use a SUBSTITUTE replacement screw. The provided screws are meant to hold the feet on and their length is such that they might make contact with other parts when driven fully in when the feet are not present (this is unlikely but not impossible.)
Instead, please use
M3.5 x 6mm flat head screws. The flat head is conical, and will not be flush once driven in, but the screw head will partially seat itself in the hole.
Do not over tighten the screws.
The reasons for this are: 1) While the end-caps hold the AX8 top and bottom panels together, the front center foot also helps hold these parts together and 2) replacing the screws ensures that dirt or other particles won't enter the chassis.
As for Velcro, always use professional "DUAL LOCK" velcro, which has sufficient height to prevent these exposed screw heads from bearing too much weight and also holds the AX8 firmly in place on your board.
If you need to know where to find these screws in the USA, please email
support@fractalaudio.com