Hi Jon,
Nice work so far!
I can't see in the picture if you've used just resin to attach everything in the hull, or if some glasscloth is added to reinforce the joints.
If it's just resin, I strongly advice to add glasscloth, rough up the surfaces and degrease well before gluing.
I've been in the same boat a number of times and I've seen motormounts break loose due to the stress of running the boat in rough circumstances, followed by a sinking boat, as the motor coming loose tore the stuffing tube free from the hull...
Regards, Jan.