The reloader kits worked with revvy shells with some minor internal modding of the plastic. But revvy boards cannot be used in reloader shells be because reloader shells do not have eye slots in the feed neck.
The paddles of the reloader and revvy are not interchangeable. The revvy motor has a hex head shaft for the paddle to mount to with a screw in the center. The reloader motor uses a splined motor shaft for the paddle to mount to with a screw in the center.