BLM-16x4-v2-02.jpg

Nice, dual footprints FTW

Actually, triple footprints: Marquardt 6425 (my favourites, still searching for a STEP model...), ITT Cannon D6R (TK's favourites, on the right), and E-Switch TL1100 as used on Wilba's original MB-SEQ board (on the left).

hell, go for broke, 90 degree MECs would fit too

Not really: they have the internal interconnection such that turning them 90° makes for a very difficult trace layout on the PCB. However, I got curious: they do fit AS IS when you are comfortable with soldering only two legs and stuffing the other two in the additional holes for the Marquardt plastic noses. This way, the MEC switches sit on the board a little inclined rotated, at the 1pm clock position so to speak. The MEC's legs need a bit of persuasion, but it actually works. Unless you opt for non-circular button caps, then the whole arrangement will look a bit funny...

Edited October 23, 2016 by ilmenator