Have you considered a 3D package on the PC... Not sure how long it took on paper, however, I did this in Sketchup in a few minutes, and it took most of the time colouring it in.
Not necessarily spruiking Sketchup as there are many 3D designers available.
Even using layout lines for 2D, which only took me about 20 minutes just to do those 9 rhumbi... hell, I now appreciate your effort on paper... my head is spinning after that.
Cheap and woodwortking in the same sentenc is an oxymoron!
