I'm not knocking math, but I could could build it at scale quicker than I could ever figure it out mathmatically. No I would start with a scale drawing and maybe build it at small scale first. I love curvi-linier joinery , but the joinery can be very complex(to get right). Good luck to to the mathmaticians out there , wish I could wrap my mind around those calculations. Great project Tom , I agee about knowing how to do the math.