Rob and Pete are top blokes, great mechanics and pretty good tunners of the Wolf
Pete tuned my car on several occations, years ago, before EAS got their own dyno, but i never met him personally, as my mechanic would drive my car there and help Pete tune it. I know Rob, since my frequent clubbing days, when i used to go to Icon .
Personally, i would only use 20psi max on pump fuel, due to the companies' inability to provided a consistant quality of fuel.
280kw using a GT30R(450hp) is pushing the envelope, but acheivable as i made 260rwkw@18psi with a HKS GTRS, only time will tell. I take it you are using the .63 exhaust housing, as i too have a GT30R rated at 500hp with a .82 ext housing. This will be fitted to my new engine.