Hi Michael,

Thought that was going to be case with the curve fillets - im still working on the workflow its seems to be working 99% of the time very now and then I get an isolated node in the middle of a 3d polyline curve made from multi segments where the angles are large definitely works 100% of the time but in zones where its very slight rotations every now then I get the odd node that fails maybe its the slight angle in 3d space from 1 segment to next. Ill keep playing with it and see if I can isolate one and send it to you to look at. Currently its mostly working which is great.

Thanks Ill get back to you soon.