Oil Filter Adapter

Good thread. Thanks. I'm trying to figure out why mine was leaking so bad so I don't have to do this again. I still haven't found the smoking gun.

Why did it leak (badly) when cold and stop leaking when hot?

The bolt was tight (at least relatively tight) and not stretched or broken.
The old gaskets (both inner and outer) had gray RTV on all sides. Is that bad?
The inner gasket area had the thin hard gasket and the foam gasket stacked, which appears to be correct for that gasket kit, but maybe that design of gasket kit is inferior.
Aluminum vs iron adapter. Has anyone experienced aluminum adapters leaking more?