Posted by JasonB on 24/05/2017 07:40:36:
Regarding the pair of stubby chuck keys, I can't find the picture at the moment but I saw a pair on MEM forum that had the shank (your knurled part) long enough to clear the jaw when it was fully would out and then a plastic handle/knob about 2" dia. This gives you enough to grip and you can apply a good amount of pressure when the other two jaws ate getting tight on teh work to move it against them.
Once you start having to juggle extra tommy bars or allen keys it all starts to get a bit of a fiddle. Though I would suggest the twin keys are used to get things close and then the normal key used to finally tighten and fine tune.
If it helps, my keys are hex anyway and so my solution is a section of old allen key forced into mock-hogany handles. No fancy ratchets though but 2" diameter gives enough leverage to snug things up before finally going round with the key to finish off.

HTH
Jon
Edited By Jon Gibbs on 24/05/2017 11:30:19