Car is sorted, faulty CAS.... 385rwkw @ 22 dropping to 18psi.... very conservative tune due to the previous issues... should swing 400rwkw without a sweat.
To those who questioned pinging trust me i can pick it up well in advance i have over $2500 in knock monitoring gear (PLEX which is the best on the market and another which was originally designed for RBs during the gibson era)
Its a truly weird occurrence and is only the second RB in 10yrs i've had with this issue (different symptoms though).