My two cents- The Kindy Motors are easy in that they already have a plug, the shaft has a screw with mount that is easy to use or modify, and they are pretty weather proof already. That being said, they are hit or miss depending on the use. Strictly for rotation, like a lightly built FCG, they work fine. But, if you choose to use them reverse directionwhen they hit a pin, they can be flaky. I have two that worked for two seasons no problem, and two that stopped working properly to reverse.
That being said, for the price, they do their job and when they are gone again for the season, you kick yourself. That being said I ordered two extra this year $37 with shipping. Worth the piece of mind.