Well my day at stealth didn't go as planned. Vince tried mapping it but I'm getting a misfire under boost around 4500rpm. Plugs were changed that morning, we also tried a new set of leads and another coil pack which didn't cure the issue. Car is staying there until the new year. Vince is going to have a look at the timing as he reckons that's the next thing to check. Quick vid of it on the rollers... https://vimeo.com/149904228