You should be aware that when replacing with a Rega arm, VTA will not be within specs using these aftermarket mounting plates. You will have to use shims on the headshell and/or thicker platter mats. Some claim VTA won't matter much, I beg to differ.
You will have to do some grinding out of the metal on the subplate with a Dremel tool, so if you're not mechanically inclined this could be a problem. You will also have to rebalance springs as the Rega arm is heavier.
So yes, you can mount a Rega arm, installation is not exactly easy, and optimum performance from that setup is not easily achieved. Still, if you are mechanically inclined and like to fiddle about with mods, I would say go for it.