I'm thinking that the 2812 1534Kv motor is very likely over propped with the 8x4E - it's suggested a 7x6 prop at max. So... probably have to see if I can be bothered to put the 1130Kv Sk3 motor in.. the one that I was fooling around with. To err on the side of safety, I am more inclined to purchase a "fresh" motor.
Probably will have to do some calculations to see if I can get her to fly a slow-fly prop, that would require a really slow motor, not sure if there are any that can do the job with 3S.
I will shelf her for the time being, as I think I want to gain some proficiency with LOS flights at speed. With the Radian and Vapor, they are so easy to fly, as well as self leveling. The Tek flies at a whole another speed level, and the reaction time needed is magnitudes higher.
As such, I've decided to build a smaller aircraft, the Nutball :)