Quote:
Originally Posted by coldlegs
. Thought about trying to use some kind of very thin flexible
metal or spring steel sheet but that stuff is difficult to work with and
reliably drill accurate holes.
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Here is one way to do it (that does work)
Get yourself a cheap tape measure, this is your hinge material.
Also acquire two pieces of steel approximately 5cm square and 6mm thick.
Drill a hole in each corner of both pieces. The holes are clearance size for whatever bolts you have on hand. Bolt them together then drill the desired hole pattern through both pieces.
Loosen the bolts enough so that you can get a section of tape measure between the two pieces under your holes. Tighten the bolts to clamp the hinge material in the metal sandwich you have just made. You should be able to drill through the jig quite easily with a little care.