Great thread!
I made a removable gas tank tray for my current build that is secured to three beams with six socket head cap screws, each with a lock washer and a flat washer.
It was easy enough to remove the tray after gluing the beams in place, but reinstalling the tray once the tank was strapped in was a little more difficult. I tried tweezers and pliers but what worked best for me was a small magnetic pickup tool. Held the washers on too.
Using the tool it's easy to put the bolt in the hole.
Sliding the tool sideways off the head of the bolt leaves the bolt and washers in place for the ball driver.