[Mart]

I think you may be out on your calcs.

If you had 17lbs at a 1" radius, you would need a heavier load at the radius of the spline, which is less than 1". 1" radius is 2" diameter.

I just measured the spline at 1.1" diameter so that's a .55" radius. 17/.55 is pprox 31.

I reckon you would need about 31 lbs acting at the radius of the splines to give an effective 17 lbs in.

I have not figured the radius of the string or the fact that the diameter is smaller between the splines. Not sure how relevant they are.

Mart.