Then there used to be the MAX-S engines that could be R?C or control line depending on the carb?

The SX versions were usually a little more racy than the FX line.

Now there is the AX line that is cheaper to make but also run pretty good.

I thought the LA40 to be rather lame myself. I had two Magician Control line planes for more than 30 years. I sold them to a guy about 3 years ago and he flew them both one day. On one he had one of my old OS-max-S 35 engines and the other had a LA40 control line engine. Wow, what a difference. The LA40 would run circles around the old 35.

I never saw a LA45 that I thought was lame. The 45 always ran pretty good.