Nice boats. Good coastal cruiser/racer if you can keep her light. Friends of mine cruised theirs and went to Noumea but they know how to sail and as racers can keep a boat very light. A heavy/overloaded racing oriented multi is slower than a fatter cruising multi properly on its lines.

Putting a pod on a Harrier could be the end of the boat in some ways. If it weighs much more than about 100kg it would be bad. It would have to be low and no headroom, just sitting headroom. A nice foam/ply one could work, but if you want full headroom just get an Easy. Easys are great coastal cruisers.

Are the transoms on or close to the water now? Then work out the waterplane area of the hulls to calculate the immersion rate (how many kilos it takes to sink say 1cm). For a 10m Harrier at about 0.8m wide waterline, you get an immersion rate of about 100kg/cm for the whole boat.

So be realky honest about what you need to bring and check the boat out empty. You can't get around physics - the boat is going down with weight and slim, small multis go down really quickly. We once removed 32 kg from our racing trimaran when cruising and we could tell. That is why our cat we built has an immersion rate more than double the Harrier. Each hull has a waterplane area of 8.8 metres squared, so this translates to an immersion rate of 180kg per cm. Our boat sits about 7cm lower when we cruise than she does unloaded and we can cruise light if needed.

So be really honest about the weight you need and do some calculations. AI can help with doing the maths but go into boats and get the waterline length and beam to give it some data.

Phil