I have a 6.5 Porter (ex BWM DS21 hull) with a 140 2s Tohat on the back with Sea Star stearing, here at the top end of Chi Harbour .
Really light to stear and will go in a straight line hands off.
Pick a nice day, and go for a squirt, subject to basic electrics being sorted theis w/end.
Or try these guys, they should know of someone or even have a demonstrator.
Mr. Steve Clarke
Mount Pleasant Lane
Tel: 01590 681445 Fax: 01590 681446
Mobile: 07836 695996