Got the centre panel gorilla glued to the spar now and the two outer panels hot wired and ready to be attached to the wing assembly.
Actually it's not Gorilla glue but a generic and identical glue which I found at our local tool supply store. It's far cheaper than the original with 760ml only being 3 times the price of 60ml of gorilla.


I used a heated blade to cut the spar slot but in truth I don't think it was worth the trouble and I could have cut it with a sharp blade far easier.