Haven't "quit". Have his 366GT in my big Yak, works just fine.
DL has a better footprint/weight/cost benefit for me in other applications.

Brillelli's are great engines, Scott is an excellent guy.
DL's are great engines, Bob K. at DLUSA is an excellent guy.

Anyone that knows me knows I try different things and like to experiment. When I choose something "different", it doesn't mean the first thing was "bad" or "defective", Holy Cow....