However, the TX will beep at you and the esc will not arm if you power on in idle up mode as the throttle has to be at 0 to arm the esc.

Just sounds like the pitch range is way off or servos may be sus; or then again maybe just was a Friday build I would definately be checking the pitch setup. If you have -10/11 at low stick, 0 at mid stick and +10/11 at full stick then the mechanics are correct and you need to adjust on the TX.