That is a good transmission. You can adjust the belt tension without having to remover the cover. Not really important. I only check mine once a year. It also appears to have a built in freewheel. Mine does not. Personally, I would not want one because you will not have compression braking and will rely on your brakes 100%. I use my brakes very little. All the belt drives are the same except for the FW. They come with a 5:1 ratio (100T) but an 80 tooth pulley can be substituted. All have the same clutch bell and bearings. Whether you have a tappered shaft or not is the critical question here.