As a longtime HPI supporter it pains me to say I think I'm going to sell my RS4 Sport 3 chassis.
It looks like parts support from HPI will continue to be downright horrible, Yeah Racing parts for this chassis seem to be a problem which sucks because I've never had an issue with the Sprint 2 YR upgrades. Exotek support is minimal. GPM is always a gamble, both on fit and finish.
I really thought HPI would have turned things around by now, but they seem to have gotten worse if anything.