My club switched from AGL to MSL 2 seasons ago. It was a hard
battle. However, we're getting more power traffic in the area, and
they report MSL. There has been some confusion, but we're working on
it.

One compromise that was made is that we set MSL, but created circle
stick-ons that fit around the altimiter to show various AGL heights:
Low tow (1250') and all thousands. The thousands needle points to the
AGL height indicator.

-John