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I suppose it might be possible to interweave the copper covering before flattening on a mandrel (round steel bar), unfortunately I don't have any strings to try it, the inner wire hooks idea would be ideal for a 'torc'.
Like the pulley, would be good for some lightweight industrial style ighting fixtures.
I've found one of these a great time saver if you're doing a lot of centre finding on round stock.https://www.rdgtools.co.uk/cgi-bin/sh000001.pl?WD=punch%20cone&PN=Engineers%2dBell%2dPunch%2d%2d%2dCentre%2dfind%2devery%2dtime%2d%2d2249%2ehtml#SID=368 I'm sure other people do them as well.
Excellent work, haven't made a knife for many years but this has rekindled my interest, just a thought for others, when finishing the handle, take care not to use a too coarse belt as it will burr the pin ends into the wood, doesn't matter if its smooth but looks scruffy, no criticism intended. : )
Have used 'Cokin' filters for many years (pre digital) and am just starting out in 3D printing, this looks very interesting.
LEDs and Lighting Class