Spiral toolpath to machine a cone?

[Voicecoil]

I'm watching this thread with interest (obviously not understanding it fully) but if you can sort it out, it would be of great for cone lamps.
The lengths of lamp are 150mm, 300mm 500mm. I also do standard lamps at 1500mm length but that would be a complete new machine for that project.
I have played with Fusion 360 but Vetric Aspire gives the best results so far but by modelling.

Mmmm, how are you machining your cones? From the height of your product I would have thought a horizontal/4th axis approach would work better than the vertical machining I'm doing - mine are only either 24 or 34mm tall. For even the 150mm high version you would need something like a 175mm cutter which is going to be neither particularly rigid or cheap I would guess.