My pins are stock, no issues. Before I started flying, I used to wipe down my pins with silicone lubricant. For some reason I don't need to do that anymore. If you have an AeroVee you will discover why. I do the right cowl first. I hang the cowl by getting the outboard 1/4 turn fastener in its hole....
If you are building an aluminum tank you can make a filler neck like the A model, and the stainless box that goes around it. We generally read the fuel level on the ground and add a specific amount of gallons, rather than watching. Two up, we can't take full fuel. It also works if you want to go ful...