The board I want to install them on is this one, if the sip legs can be cutted I would get the long ones, I think.
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Very nice board mate, that's gonna look incredible.
Just what I thought, I think both of them should work fine. I don't have a picture right now (because I'm on mobile) showing the differences between PCB x Plate mounted boards. But it's very clear for me that is the gap inside the switch that matters, since the SIPs go inside them and they (the switches) are soldered on the PCB anyway.