Issues dividing joint curves

Hi,

I got 3 curves as shown on the picture, the outer one is a trimmed circle and an arc joint together. When I try to divide point on the three curves it won't align nicely concerning amount of points or positions. It seems that the arc and the trimmed circle are not fulled jointed. I have tried to use join, merge, weave and stream filter, all with the same results.

I also tried to simply multiply the points on the inner circles with 2 and then use cull to remove unnecessary points on the outer curve, see the second picture. This did not work out either..

In the end I want to join the points with curves and create a gridshell, much like this: https://vimeo.com/60604978

Edit: Just ignore the Bang! and Arc components on the second picture

Appreciate any help!
Arvid