Hi Gordon,
I agree with you on all counts, I have over 3 years on my Hawk now (time fly’s!) Next weekend will be its 4th British Nationals outing!
I have hundreds of flights on it now and I still love flying it. One of the nicest airframes I have flown.

As for the Wren 44, well, what can i say? The engine is at least 5 years old, has done...I don’t know how many hours...never been back for service, still runs perfectly.
In my opinion there is nothing to touch it in the small turbine class.

As for your changes, I would not put the turbine too far back, I followed the standard installation and still needed a little nose weight.
Are you using the intake (or part of them) that you have for electrics? This will affect the location of you fuel tank.
I use the 2 standard conformal tanks supplied by Jim (you could still use these) I them have a UAT under the cockpit area.

Are you going to the Nats?
If so, look me up on the Show Line you can have a good look at my installation.

Paul