Just because a product is TUV approved, does not make it a "better" product for a given job,
Just means a sample of that product has passed a series of tests !!, However i do think Matt Lee should have submitted his wheels / design for approval, even for his own sake, if the worse should happen
In the past , I have bent, buckled, and destroyed, standard steel & Disco steels, , bent Wolf & Modular rims etc
Since using M5's, for the last couple of years had no problems