I have used a screw modifier on a curve. the problem I am having is that on the inside of the curve, the coils should touch, yet not compress. Here, the coils compress and they don't touch. Any ideas?

I have used a screw modifier on a curve. the problem I am having is that on the inside of the curve, the coils should touch, yet not compress. Here, the coils compress and they don't touch. Any ideas?
