Foam or no foam?

[lastlight]

I seem to recall always reading foam for no-trim tanks and no foam for trimmed tanks. I used foam on my tank but not sure if I would if there was trim. Does the foam end up contacting the floated glass bottom if you use it?

Seems to me like the trim might really sink into the foam due to high pressure and then the bottom may touch the foam but not as evenly as when the tank has no trim.

Just thinking aloud tho. Haven't had trim on a tank in some time.