I also have this setup. Rap30, Webra 35, Weston 'low nitro' pipe and 5% Red Max fuel.
It rocks!
The engine is still running in, so I've been keeping it on the rich side. I've got less than a gallon through it. Its really coming along nicely - leaning the engine three clicks from its rich setting results in a lovely 1800+ RPM hover. At the rate its going I'm going to have to lower my (hover) throttle curve!