Agree that balance shouldn't be an issue...my fuel tank is below deck (like Nashers) and teh triple battery system is centrally located.
I've also got Hydraulic Trim tabs which help with balancing (esp. when laden with Dive Gear etc.)
Take your point re offset
Hope this ones a goer...it's a 2005 Opti with 340 hours XL shaft with 21 SS prop.
I understand it was from a marine police RIB (Dorset?) and was sold as pair at auction (engines upgraded to 225 Opti's I'm told, but who knows...)
Went to dealer in Holland...that is who's selling (not been used since). have asked some more questions and asked for a diagnostic report to show my mech....wait and see.
Thanks again guys!!