I have not had a re-occurrence of the hard P0300 since gaping my plugs down to .028 several thousand miles ago. I'm on Uni stg1 now though so I'll have to remember to flash back to stock in case I go to the dealer. Would be interesting to see what they changed in the map, assuming they actually changed the mapping vs just modifying the conditions required for the code to set
I would have done that if it wasn't under warranty, as in my mind this is their problem not mine haha.
I'm hoping because they took so long they actually fixed the issue instead of just making it so the CEL doesn't come on any more. But in either case i can at least renew my plates and pass my emissions/smog testing (CEL is instant failure), so im happier.