Wojtek,
If you're so sure it's the engine, and not some other problem with your installation, I'll give you $2500 for the engine right now, sight unseen. I've got another project that could use a pair of AT-400's. If I don't get at least 6 more hours out of it, I'll give you another $1000. If you can take a credit card, give me a call or email and I'll give you CC number. At 6 hours, I'll send you the logbook entries, or the $1000. Jetmax, you interested in this offer for your "sluggish POS"?
Bob Carlton
Silent Wings Airshows
Albuquerque, NM
505-275-5945
[email protected]