Hey Marty
Good to hear from you, yeah the wren 44 would be perfect for the Tutor, I have been looking at the 44 for another project of mine, looks like a cool little engine. I will shoot Doug an email, it would be to get that than start from scratch, it looks really scale. If not I will build a ducted fan size glassed up foamy to test the aircraft out, if all works well I will make a larger one. I hear the take off speeds and landing speeds are a problem due to the thin wing. A new kind of flap has been developed here at work and this flap also works on delta wings so I will test this on the ducted fan model and go from there.
As far as the Harrier is concerned, I have a guy making some custom electronics up to make it more stable, we should be testing in a few weeks.