i think what krayzc-RCU means is use a piece of fuel tube 3/16 long or so slipped over the clevis to insure it cant open.
dont just rely on the clevis alone. the clevis alone may hold, but this is cheap insurance.
these type of clevis are fine to use on the smaller planes. they will last many flights with very little wear.

nice job on the canopy tint,also good thinking painting the cockpit so the balsa color cant be seen.

your tank is going to be way too low! unless you are using a fuel pump. it should be center of tank inline with the carb level.
you can raise it with some foam layer. the foam will also help prevent the fuel from foaming from heavy vibration.