The fin has been glued on already but basically the kit fin involves a rudder post and a former that runs parallel to the leading edge, I basically added 2 fuselage formers that had fin extensions in it these were bonded into the fuzz leaving the extensions protruding out of the top, the fin then slid over these and they were bonded to the skin of the fin with the rear one meeting the kit spar inside the stab.
im definitely going against all advice and fitting 2 engines so didn't have much vertical height to play with in the fuzz unlike Trond who only had an engine in the bottom position.

if you look inside the fizz you will see what I assume is part of Airworlds answer to securing the fin, in the form of a cut out in one of the rear formers,i wasn't happy with just that amount of load transfer from a fin that size though to be fair, it is a very small rudder.

cockpit is built from H.I.P.S sheet(plastic card) not ABS as abs is too trick to join and I like using Plastic weld to build.