I purchased the same unit and I can attest to what you wrote. It is actually fine when it first boots up but it heats up very quickly and slows down. It definitely needs a better heat sink or a fan.
I might give the yolan box a shot as that has a built in fan.
Hey Mike,
I already made an appointment at Carson Toyota. I'll keep an eye on my odo and my dash cam. I'm hoping everything goes smoothly. Yea man, I would be down to meet up. I have only seen 1 Supra since getting my car and that was 2 months ago lol.