So sorry to hear that!

As a fellow Aeropeg user, it seems that every time I stopped someplace, someone with a GL1800 of some variety had a story to tell about their Aeropeg drama.
"Most" of the time, it was "only" the valve cover, but a few times, some people stated that they really screwed things up.
Hopefully yours is the former.

Best of luck and please keep us posted.
Steve