OMEX is very good, its a dream to map and Andy offers brilliant tech support and is only a phonecall away. I've used both the 600 and the 710 and now they've got the CAN network sorted on the 710 it's very, very good.

Regards your rev limit being lower, sadly that actually means you need a longer inlet. To get away with a shorter inlet length you'd have to rev higher.

How scared of brutal modifications are you? Having now seen exactly whats involved, cutting back the 'shelf' on which the wiper motor rests isn't actually that bad...