No. The MCPCB has to fit both the host and the emitter. I have no idea what emitter those boards are intended for, but it isn’t anything commonly used in flashlights these days. The common emitter sizes are 5050 (5x5mm) with a center thermal pad, like the Cree XM-L/2 & XPH50, and the Luminus SST-40; or 3535 (3.5x3.5mm) with a center thermal pad, like the Cree XP-L, XP-G, Luminus SST-20, Nichia 219C & 319A ,and LH351 b, c & d.

Can you explain what you mean?

How are you going to mess about with them? There is no open-source firmware for them, so you won’t be able to do much. You can’t run biscotti bistro-HD’s biscotti-HD variant, babka, and various older firmwares.

Just get a 105c.