Originally Posted by fryedaze
The spring loaded pin could be fabricated by a machinist or a crafty DIY dude
I agree. The pin would simply be rod, the handle to release the pin could threaded and then loctited , the easy to remove stuff, NOT the permanent lockers. The easy stuff will still hold tenaciously but at least the pin will be removeable without breaking it.
A knob could be fabbed by using a S.B. nut soldered on and then ground/filed to round. Don't use a good wheel on a grinder but rather a sanding disc.
Yes the grinder wheel can be cleaned but the wheel will load up take some life out of it.
Silicon bronze rod should be suitable. Maybe even a cutdown LONG bolt or two.
Some chanderies will have bolts and rods in short lengths. A good FASTENER house should also have some if this stuff. Actually if you have and rigging specialist houses that do building/repairs they may be able to help.
Any friends with a lathe? Actually, just a drill press to drill the pin and help start the tap straight . The rest could be done with hand tools.