RE: Kat 40 Dude!!
OMP and Accel have Kats from the same container, and all are identical. Both companies will shi[ ASAP.
As far as inexpensive engines that perform, loads of folks like the Thunder Tiger 46, and rightfully so. I am not partial to the GMS or Tower lines. I do like the Webras. All of that is opinion, and there are to be others, I'm sure.