It may or may not be a problem. The ones I buy are 45 mm long. That produces a pedal travel that works pretty well for my pedal design. You can move the base of the mount further back, or mount it higher up on the pedal, depending on how you mount it. The problem you might run into is that the pot doesn't go to it's furthest extent to the top and bottom. I think this can be adjusted for in Hauptwerk, but it also depends on your mounting design. Another potential problem is the pedal ends up with too many degrees of movement, which can be rectified by changing the pedal design. Since you already bought them anyway, I'd give them a try. If they really don't work out, I'd get 45 mm ones:
https://www.mouser.ca/ProductDetail/Alp ... cycode=CAD