RE: morane-eindecker thingy
Next job is the front v-strut. Like the main strut, it is angled in two dimensions. To cut the angles at each end, I draw a "normalized" view of it looking from the side, onto a piece of plywood that becomes the holding fixture. The height of the side view is the hypoteneuse of the triangle that the strut makes from the fuse bottom, looking at the front view. The rotary tool is then angled appropriately using a plywood triangle-template, produced from the dimension of the front view. Actually, I did not have good dimensional info for these struts, so took measurements the best I could, of the space the pylon would occupy, and also used some small sticks that I cut to get an estimate of the final length of the struts.
I propped up one strut with a bunch of blocks, soldered the bottom first, turned it over, did the top joint. Ditto for the second strut.