I think the 30 ft lines will be too short and the 60 ft lines too long. [] Should be able to order a set of 52ft 012 lines. That will be about right.

If you get serious you need an adjustable weight box. I make mine out of plywood and put a thick piece of ply on one side. Drill and tap 1/4 x 20 and seal with a Nylon bolt. I use BB's and put them in, or take them out, five at a time. Two pennies is about right for your 1/2A Skyray.