How are you guys holding down the front of the Harrier's hatch where it goes in the slot ?
It is a bit loose and vibrates a lot.

L

I put thin foam weather stripping under the edges of mine it helped alot.

Run some cyano over the bit that goes into the slot and let it dry. Repeat if still loose. I packed the tank in foam and left some of the packing above the fuselage sides. Pressing the canopy down on this stopped any movement.