I used a flox mixture to try to dress the gaps where the cowl halves meet.
The cover panels on the forward side of the spar carry-thru were attached. These tool a bit of modification as I was not able to get as tight a bend in the fuel lines and they would have needed, so I had to elongate the slot for the fuel line exit.
The seat floor panels were permanently installed with all screws.
The inlet ring to plenum tubes were secured with hose clamps.