I don't recommend a motor under a hay elevstor. There is so much chaff coming off bales as they are loaded that the motor will be buried after just a short while. Chaff will get into the belt area and will heat up. Pretty soon heat from the covered motor or belt rub may cook the motor or start a fire. All mine are outboard of the conveyer chain and rails. I use one to get bales up to the mow and another that is horizontal to move them in and out of the mow stations.