Smiles, what kind of boat are you working on? I have a jackplate on my Crestliner alongside my 8hp Honda kicker and have no problems. Seems to manuver just fine trolling. I only went with a 6 inch setback on a manual plate (Cabelas) to keep things simple and not overdo the transom load. Crestliner has a 95 inch beam on the back end, so I do have lots of space.
Email me if you want a picture or more info. The plate really made a difference for me although I'm still playing around some with engine height. Didn't gain a whole lot in speed (1-2mph) but the handling is something else entirely!