Well, David,
there are rumors (you can say gossip) that Mike Starret, in spite if benig a top class pilot and having a superb (performancewise) ship, became desilusioned because he felt the size of his ELIMINATOR was hurting his scores.
It seems, though, that bigger ships "present" (whatever that means) better.
A far as performance is concerned, the OS.25VF with a pipe and a 10X3 or 10X4 APC prop is great!
It has enough power to pull any ship that a good unpiped .40 would be able to haul.
I have been using one for a couple of years, and it's a reliable setup. It's nor as weather sensitive as the PA engines, it starts at the first or second flip and with 16 3/4 " pipe and a 10X3 APC it'll run on the 12,000 rpm neighborhood really well.
I prefer 15 % nitro, with 22% castor/synth (50%50) oil.
You can call me a happy camper!
I'm finishing a Chizler that I think is gonna fly pretty darn well!