Gazzer, i love the wren stuff too. Have a homebuilt MW54 running in my Sabre...sweet little machine. A few mods to the MK1 design and now the small devil is pushing 6,3 kilos (a tad more than the current MK3 i believe). I also have it running on the so-loved ProJet Eagle ECU.

I was also the one mentioning the russian manufacturing methods......as for JetCat, the chamber vents are more or less bent "by hand" rather than using production rigs....so no 2 vents are going to be equal, reproducability is near zero (thats why many of the bees have to be disassembled and fine-tuned before going into sale). I just don't like the thought of that in a high tech turbine....
(nothing against the russians, they are very able to produce fine products with crude methods, especially in aviation....and quite often have a lot of more innovative approaches. I just don't think that a 50lbs hammer is the right tool to fix every problem )

Don't get me wrong, JetCat was leading the jet age a while back, but they have "rested" on that reputation and let many innovative ideas pass by....that, combined with the ECU problems, makes me look away from JetCat.