Thanks for all the nice comments.
I don't know the piece count. The core construction is very stable with some weaker parts attached to it. That makes it "swoschable" enough, but you might have to make some adjustments afterwards.
No super unconventional stuff. A couple of "stud in technic hole" connections though. Yes, there is a seat for the gunner as well.
By using those three studded corner plates with two of the studs sticking out from a stack of 1x1 plates. Every pair of 2x2 tiles have one corner plate. The plate stack has some vertical clips that connects to handle bars at the back of the airspeeder. The "Grill" is made up of two pieces, stud facing inwards.
Confusing enough? I'll try to show some pictures.