Hi Ulrich!
If you are buying a Frank-turbine, you might want to look for soemthin with a huge fuselage and enough fuel-capacity. From my experience the Frank turbines have a higher fuel consumption. I flew my Roo with a P-80 and a Frank TJ-67 and had to cut the flight-time by 30%....
I highly recommend a small 80N turbine. Go for a Booster 80+, JetCat P-70 or a Wren Super Sport. They have lots of power, but are smalla t the same time. So they will easily fit in almost everything around.
I would recommend two jet trainers:
1. The Reaction R54. The kit is perfect, comes complete with all hardware and everything. Great construction and perfecter flyer. Knife-edge over 400m, perfect slow-rolls, goes well over 200km/h and lands as slow as your Trainer 40

. It is completely wood and there are chances to do some individual things. Have look at the R54 thread or use the Index to that thread on
www.btemodels.com
2. PAF Sting. PAF is a german company and they have a few nice jets on their webside. The Sting is a kit with fiberglass fuselage and foam-wings/stabs. It is a real builders kit, but for that reason a cheap alternative to the Bandits out there. Looks really nice and flies pretty fast on a P-60. If you want to fly real fast, one of the above mentioned turbines will fit easily. Mine weights in at less than 8kg tow. It is really quick and aerobatic. With full flaps it comes in for landing like a *****-cat. I was really impressed by the first flights.
Best regards,
David