Re: Towing vs carrying a Rib on board
An 11 foot or more RIB is to large and heavy to carry on the foredeck of a 34 footer.
Unless you are going offshore, tow it. If oyu are going offshore, get davits or a different dingy. Coastal cruising for 10 years I towed my 11foot RIB without a problem. 9HP is plenty of power, always put the outboard on the stern rail when heading out.
Rig a three part towing bridle so the side towing rings dont take the jerking load in a seaway (or they'll separate off...).
Certified...in several regards...