Lets talk about outboard motors and how you carry them. Just returned from Labrador and N. Quebec and we had to move outboards around. I think a bracket on float cross thwart-brace might serve dual purpose-ie place to carry motor plus you could put motor down to troll plane around for fishing off float. We hauled up to 15hp motor on top of float but was hard to strap on and hard on top of float. Yeh.Yeh external loads but lets see how somone might do this. I am thinking a 2-3.5hp that we could use 100ll in if needed would fit and work good I think older 2 stroke might fit in float comp. but I don't have an older motor to try.