So after a while of use I can only encourage you to try this board / layout - I really like it not only because I made it 

 get some leftovers below and just cut your case 

Surplus available right now (prefer EU shipping...), PM me if you're interested. PCBs are fully soldered, only RST switch is missing and LED jumper.
- 4 PCBS, one has prototyping marks (scratches, ISP header soldered). All work. 25 (Proto one 10)
- 3 Daughterboards, 10
- 5 Felt dampers, 5
- 3 Plates, brass. One bead blasted, two shiny. One shiny has a small ding on the side, probably can sand. Blasted 15, shiny 10, dinged 5. Switch openings are tight on all plates, need some patience during assembly but working.
- 5 weights, brass, shiny. 5
Pack of all until available: 35