Im not staying its right to reuse them, you SHOULD change them, but, that said I personaly never have on an A-series due to the cost far out weighing the risk. on every single V8 I ALWAYS change them, but then the cost is minimal like a few hundred rand vs A-series at a few thousand.

I have used VDL, then switched to Goch&Cooper, they are the best regrinders in SA in my opinion, Deon is very helpfull and the 296 profile him and I put together works amazingly well, even as a street car it idles at 950rpm no problem and has plenty of mid range and top end, on the A12 it might not be so friendly, but what I found is that Deon actualy listens to the customers request,