Are there any good ways out there to coil stainless tubing without kinking it? I haven't tried yet but I have mine on the way and I'd rather not kink it and have to do it over.
I've heard filling it with sand works.
use salt instead of sand if you want to go that route. it doesnt cause microscratches in the surface, and will dissolve entirely when washed out with water.
however the best and easiest thing to do is to use a tubing coiler...
which does a pretty good job
i built this one for about $40 using this as a rough guide:http://home.comcast.net/~bkerby/DIYTubingBender.pdf
What spacing did you use between your lower wheels? What diameter did that get your coil to?