Changes
* long screws and tubular spacers.
** screw length 15 + 12 = 27 mm ideally, we take 30 mm (standard, threads on the screen can absorb an additional 3 mm)
** additional set of tubular spacers: length 12 mm, plastic (?) tubing 5 x 1 mm
* or "spacer screws" (ideally 7 mm) with long (4 mm instead of 3 mm) male threaded ends
