Hi,
here is the picture as promised.
Sorry for the delay, but I´m studying and certifying in stainless steel welding and processes. and it´s taking all my day, when I return home I don´t want to work anymore.

this is a very primitive tool made by myself just to get some curves on a model that was giving me a headache.
I made it with 2 pieces of MDF, 2 screws, bike spokes, and the adhesive foam (the one used in aluminum windows and doors to seal).
I made grooves each cm, so the spoke could move in the same direction without getting closer to the next one,, added the adhesive foam, to tight them up, joined it with 2 screws and started measuring curves.
I´m pretty sure you can improve it, because this one tends to move the central spokes, I´m going to add a third screw in the middle trying to solve this problem.
Hope it helps you.
by the way, you can join 2 or more, and make a larger one.

