Don't rely on the hose clamp to hold it in place. Your mounting brackets need to do this job for you. This is where i'm having difficulty coming up with a good bracket design. Right now the ghetto bailing wire i used will keep it from moving back, I also used to pieces of plywood sandwiched around the center swimdeck bracket to keep it from moving upwards. It is rock solid. I think i have a design that will look better and still be solid, but until i have time to really mess with it i won't know. If i were ya'll i would concentrate on the mounting of it and Making that bomber and less on a rubber coupling.
I just realized that in the picture i posted it is very hard to see the bailing wire i have going to the wake plate brackets. This is what keeps it from moving back.