power window upgrades

[SilverMiner]

Has anyone ever tried the relay upgrade with a power rear window like in a suburban or K5? I'd imagine that if there is enough voltage drop just getting to the door windows of a pickup to be noticable, the drop all the way to the rear of a suburban must really be significant.

I'm close to diving into the tailgate of my 80 Suburban once the weather gets just a bit warmer. The wiring is probably similar enough that I think I'll give the relay project a try.