Oh, dear. OP, if your goal is to shoot 2x3 with a variety of lenses you'd be better off selling y'r little Busch, lovely though it is, and buying two 2x3 Pacemaker Graphics. A long (Speed) for the focal plane shutter and for slightly longer lenses and a short (Crown/Century) for short lenses. If only one, a Crown/Century. The Graphics are much better supported.
My first 2x3 camera was a Busch. I gave up on it, went Pacemaker Graphic because boards for the Busch were so hard to find. Also, if I recall correctly, 2x3 Busches' lens throats are smaller than 2x3 Pacemaker Graphics' (48 mm square). This can be limiting.
I've had a Miniature Speed Graphic. Miniature Speed Graphic is the model's name, not all 2x3 Graphics are Minis. The Mini is essentially a 2x3 Anniversary Graphic. Annys work well but IMO Pacemakers are preferable.