RE: Transavia PL-12 (Airtruk) build
Here's a few pics of mine but I have plug in wings and a removable cowl.
I would suggest building the upper fuz structure and have the entire thing removable for access to wing bolts and other internals.
Obviously you have no functioning hopper installed to get in the way of this.
Perhaps a dowel at the front or rear of the the upper fuz locating into former with a simple latch or bolt system at the opposing end (ala wing mounting principle) would work for you.
The other option is to have a removable pilot and a door that opens but this makes things more complicated and fragile to my mind.
The first option makes for easy transport and less to knock around and would seem to be lighter.
As you can see my pilot is a double amputee and has half his butt missing in order to fit....[:@]
He's dedicated!
Glad to be of help,
Gary.