Long ago when I had my Alberg 30 (in St. Andrews, NB), head gasket went (white smoke and all). Replaced the head gasket with the Atomic4 "in situ". Not easy, but could be done. Great fun scraping away the last of the old head gasket, and was very careful to correctly use a torque wrench on the bolts when tightening them up afterwards. Tom Moffatt