summernights was recorded with his steinberger.
from "mike's guitar site"
STEINBERGERS
Ed is a big fan of the Steinberger TransTrem (which unlike standard trems raises and lowers all the strings in pitch and can be locked in various keys)
He had thought of endorsing Steinberger guitars before Music Man but wasn't keen on the active EMG pickups and the synthetic body and neck materials. He has had standard guitars spoecially fitted with TransTrems as shown below
Yup, I read somewhere it was a MM Axis-like guitar with a TransTrem that was actually built by Ed Roman for EVH. It had DiMarzio pickups like the Music Man.