you just spent good money on a race package and losi would surely credit you your time and a fresh start nib. iv got a handful of engines here next to me but a new engine, nor new shocks shouldnt have these kinds of problems. about a year and a half ago i bought a nib 8t rtr and that thing just rocked for 2 gallons just the way it was out of the box(with stock steering servo on throttle and a good steering servo on the steering)
this just seems to be a great time to build a relations with losi and or horizon. they are always good ad admitting faults and replacing things in ample time