The Accurate Miniatures kit has a great interior for and it was enhanced with an Eduard color PE set. I put some additional cables in using lycra rigging material and lead solder.
I've been using the In detail and Scale publication as the primary reference. So far everything is looking close enough for government work when it comes to the -3 version.
Had to do some sanding on the canopies to get them to stack properly. There is a lot of PE on the inside, but you don't see much when the seats and MG are in place.