Why not simply replace the TX/RX with a servotester...???
Like this $20 thing:
http://www2.towerhobbies.com/cgi-bin...?&I=LXVK79&P=7
With my SimJet's I just plug the ECU-RX cable in the tester. Switch on power on tester and turbine. The tester is now moved from -100% to +100% and back, and the ECU have learned the low throttle and high throttle - and begins startup procedure...
The thrust can now be adjusted with the tester - and to stop the turbine, I just take the tester to -140%.
Don't know what to do with the "Safety switch" - or how it works.