Just had my R129 fail the MOT on emissions after the secondary cat delete I had done in April. Car has done under 700 miles since the previous MOT, which was fine. Luckily I'd put it in early just in case - I've got till the end of the month to get it sorted. I've not heard of anyone else having this problem? Just to be clear, it failed solely on the emission readings. Not the fact that it only had 2 cats now rather than 4.