I need some help regarding a 3-d drawing, to get it ready to save to a file suitable for 3-d printing. It is a sailing vessel's winch drum, which I originally designed in many parts, to be assembled with photo etched brass and laser cut plywood. However, because the kit I am designing is aimed at beginners, I felt it was too complicated.
I am trying to draw it in 3-d, but have a problem with the octagonal sides, as they are tapered. Each edge should be a single line, and not have a 'V' shape between each one. How can I make this assembly as one, so it can be 3-d printed as a one piece solid?
I have uploaded the file, plus a 2-d drawing to show what it should look like.
(TC 21.1 64 bit Professional)