I also recomend 120' lines if you have the space to use them. I used to be a solo flyer using mostly 85' lines until I attended a rev clinic. I set up with my brand new set of 120' lines and was practicing hovers and what not. when all of the sudden 1 more experinced flyer ask if they could fly with me, I said of coarse. Next thing you know a couple more pilots joined in and we were team flying with 4 flyers. I must admit I was hooked and loving it.