I think what I will do is to just put the FOD screen on and run it down the raunway to see what happens, I think maybe I am close enough with the static thrust to attempt a flight after some high speed runns, they will indicate if the airframe /power setup is a viable option.

If it flies on this setup (making at best 12 Lbs) a 6-8kg and up turbine would fly it really well.
On a hot day we have a dencety alt of around 8000 ' pluss , so maybe the intakes as is can not keep up with fan demand, the fan itself is only making about 75-80% of what it can anyway due to engine suffering a little.

I have read that (at optimum) the setup I have coud deliver 12-13 Lbs , so taking into account our alt and the ducting not being optimized I think I am pretty much as the apex of what I can expect on the ground for now. To gain the extra lb I would have to totally rebuild the whole ducting system.....as long as it flies OK and not fall out of the sky I am happy, blistering speed is not essensial for me, besides my eyes and reactions are not what they were 15 years ago LOL

Theuns