Thanks, after your reply I checked again, this time not using the cap form a switchtester, but a normal
key from a QMK set. And indeed, this time I can put it on the switch in a 90 degree angle! Maybe it has some wobble it doesn't have in the normal state, but it worked now! Thanks, together with the dedicated
reset button I seriously look into the Cospad set again and what layouts would suit my needs. Cheers.