Hi Simon it only takes me about ten minits to take the top of and put on
i have got a removable back window its on hinges from an old sun roof
that i got from the breakers that makes it esey to lift on and off by myself.
Have you thought of over centre latches on the windscreen posts as the ac cobras have.
i am shore you could yous the same type of latches for the back of the door.
sum kind of locating pin and socket for the back.
you can fined a large selection at car builder solutions. or europa spares.
Les.
