Gas tank overfill

[Old Radio Tech]

This has happened more than once now. Filling my regular gas filler tube using an unleaded gas nozzle. The unleaded kickoff allows gas to come up the tube too far resulting in an overflow out the channel on the top of the tank on the passenger side to ground. Been filling with the nozzle on the slower fill notch. User the faster filling notch or find an unleaded insert for the filler tube???