Yes, those models look to be reasonably original. interestingly, there was only one hatch - the one at the stern. When I complete my long-mothballed Sea Hornet, I'll probably make up a second hatch to cover the engine compartment.
How's your progress?
Tim.

Yes you'd be right to put a hatch behind first row of seats, that's where motor access hatch was originally, not second row seats as in your model. it original only had two set of bench seats, each behind their own window screens.

Cannot remember what happened to my "Hornet", maybe it went the same way as my CorgI and Dingy toy car, kindly given away by my Mother in my teens, whilst I was in the RAF, thought I finished with them, women they don't understand us fellows :-)

I've just launched my latest model a RAF Fire Launch pictures on this site, still some way to go, fire monitors etc, turned out to be very responsive and quick, once fitted 50amp controller and tweaked blades.
Peter47