I need your guys honest opinion here. I'm trying to convince my parent to let me buy a second trimmer. I want a FS 90R because of the straight shaft, and keep my JD. I plan on alternating them on jobs. I'll have the money for it even if I don't get the large job I hope to get, later in the season. Paying Cash. So, the question is do I need 2 trimmers? PLEASE HELP!