Austin my bro has aluminim wheels and they blow ass. He cant go below 10 psi or the bead will slip. I know of 3 others that had the same problem.
Kiyul used to have them when he had yota axles and he went down to 5psi all the time. When he got steel wheels the beads awlays blew. Probably was partiall from soaping the bead to get it on the wheel.
I think its all luck.
Id just buy some steel wheels, sand down the bead to bare metal and there you go, custom bead locks. haha...