I finally decided to place the receiver on the very left side of the wing, however this requires the servos to run rather long wires across the wing, which probably add a fair bit of weight. On the flip side, the fpv transmitter can be put in the other wing, so they won't be too close together, and will balance each other out. First, I thought I'd just desolder the servo connections and extend the leads directly from the servo.
Unfortunately, it is nigh impossible to get the control board out to desolder :( So, the next better option is to just use extension leads.
article from flitetest, applied Amazing Goop to the leading edge of the wing.
For the big wires from the speed controller, I've held them down using cable ties threaded between the wing. However, I cut small strips of plywood to strengthen the areas where the cable ties are, in the hope that the plywood will resist the cable ties from "biting" through the foam.
Anyways, if all goes well, I hope to maiden this baby tomorrow!