I had been using a piece of wood to prop my doors open, but while at Allan’s I noticed that he would slide an undersized bolt into a hole in the hinge to keep the doors open. This keeps the door opening clear and prevents the door from becoming a guillotine when you accidentally bump the wood. I’m not sure what the purpose of the hole is, but it’s not used when using door actuators. I bought two 1/4” diameter x 5” long quick-release pins from McMaster. There’s no need for anything other than round piece of metal, but I wanted to attach a lanyard (a piece of string) to keep it from getting misplaced. The pin only needs to be long enough to bridge the bolts, but I found that the extra length makes things a bit easier.
The pin holds the door open in a nearly vertical position
The pin rests on the screw heads and washers which prevents the fiberglass from being damaged.