you could of warned me ben, this is all your fault!
you defo got it in acro when testing also it might raign throttle back if motors dont lift if not, did you get spare motors dave or just 4 ?
Not sure what it was but I remember when I first built my mini I spun motors up on RX only and all was good wired them to naze and they seemed to stop speeding up at half throttle but when I stuck props on all was good I. Held it and throttled up and thrust increased all way to full throttle. Thought it was strange at time but quad was sweet so just carried on. Probably not what's happening to yours but worth a go before you start unsoldering stuff.