i think both products are quality, although ive not run a PPS frame for more than 4 months, the PPP frame fitted on the G40 was fitted for a good few years and bar some scuffs on the bottom from bottoming out, all welds looked OK but tbh i didnt investigate too much. i did have a knocking on braking but this was resolved by a new rear gearbox mount.
im sure if you spoke to Norm, he would be happy to supply a new gearbox mount, and im sure on the other side of the fence, Andy and Yoof would aswell.
yes its scary but as its a simple fix and with high-performance cars you should check the quality of your suspension components on a regular basis.