I designed a new quick latch for the arm hinges. They self latch when you open the arms and you hear them click when they snap into place. Then pull with one finger to release them. I made them out of 1/8” thick lexan.
@Pdwhite, if you like this concept feel free to use it on future builds. It would certainly be cheaper to make than the twist knobs and you might be able to make them from scrap carbon if they were long enough to bend easy.
Here is the file:
Arm Hinge Spring Latch.stl (114.1 KB)