I have used a belt drive for a year and a half. I would never buy another one again. They have their palce but it is not on my trailer. I would invest in a Z for efficiency purposes. I bought one and it has saved me an unbelievable amount of time. Just getting it off the trailer for one, and the amount of line trimming I have to do now as opposed to the belt drive (you can back it up into tight places. Definately go with the Z.