I built a 500 series Me-109 and tried to fly it with rubber power (kit and after market rubber), but it was far too heavy to fly. I tried a Bird Dog on rubber power (after market rubber) and just couldn't get it to fly right despite being light as a feather and a high wing model which should have made it easy.
Then I built a 400 series P-51 for
electric R/C and got about 5-6 minute flights with pretty darn good handling.
The F-15 I built for display only, but R/C conversions have been made.
I am drawn towards the fun of trying to make my models fly, but the expense for the hardware and the time and money involved to get out of town to fly the plane has pretty much shut down any desire I have to build for R/C so I confess to having not built any planes in the past year, though I have done a little work on one, but I've got no where to fly it when done. My next plane will probably be for display only.