Feature request: simplify nut insertions in corners of corner pieces

[brandonheller]

I found putting the nuts on the frame corners painful. Eventually I gave up on fingers and switched to pliers, but there has to be some way to make these easier to attach, like a partial nut trap to hold it in place while attaching the screw. Yes, this would reduce the thickness of the screw channel slightly, but a small detent from the partial nut trap might be enough to enable the easy use of fingers, rather than careful use of pliers.

[brandonheller]

I made some changes that definitely help with this, both adding a mini nut trap, and removing the small triangular piece at the edge that fits in the openbeam slot and prevents your finger from holding the nut on. Will send a pull request in the next week.

[brandonheller]

Forgot about this one - unfortunately, the little indents didn't seem to help much. With a little practice, using pliers to hold the nuts is not too bad. Tempted to make a mini wrench to help hold the nut in place and remove the need for pliers.