Glad you're enjoying the Aero Lucky. I've now covered 3700 miles in mine and like you had the issue of the side exit pipes vibrating - first the drivers side and then the passenger side. Seems the brackets that hold the exhausts in place either crack or work loose. Obviously a common problem.
Of more concern is the seeming lack of stone chip protection in the passenger side wheelarch (my car and the dealer demonstrator were the same). Because of this the bare aluminium arch is peppered with stone chips and annoyingly at some stage a stone has flicked up into the arch with such velocity that it has caused a small 'lump' to protrude on the external wing with some accompanying paint damage. It seems crazy that Morgan seemingly didn't fit some form of wheelarch liner at the factory. I'm in discussion with the dealer about how best to resolve this.
Other than that I absolutely love the thing./