Extrude Polygon Along Curve

[Chris_TC]

Sorry for taking so long to answer. I've only now had a chance to take another look at my compound. I implemented Fabricio's/Guillaume's awesome technique, and I think I got that right. But for some reason I've set it up such that I only get a good result when the input polygon is roughly facing the +Z axis* Something's definitely not right.
*This has nothing to do with Fabricio's technique by the way. I remember having this issue back when I first made the compound.

I don't know how soon I can get back to it, so here's the compound like you asked. Unfortunately, some of it is hard to read - I initally avoided Repeat nodes, which makes the logic much bigger. However, the Normals technique seems to require a repeat node, because each normal depends on the previous one.

[Hirazi Blue]

Thanks...
I will try to "decipher" it & that in itself will be a valuable learning experience I'm sure

[Chris_TC]

Sure thing. I recommend to look at each sub tree step by step. Unplug things and visualize values starting on the left. Then keep track of them and see how they change as you move to the right. That's how I'd decipher my own tree now if I had to.

Also, always try to work with simple objects. Instead of applying the compound on a mesh with 10,000 polygons and using a really long curve, I'd just use a cube and a linear 3-segment curve or something.