I am a retired line maintenance engineer -qualified on RR,GE and P+W big fan engines and this thread has made me get out the books and go back to first principles,trying to bring back stuff that I was taught 30 - 40 years ago and have enjoyed it very much -keeping the brain active! I hope our friend can overcome all the difficulties and get his engine to run and keep us informed as to progress.If he runs into problems I am sure there is enough knowledge both practical and theoretical on Pprune to advise him. Once again I advise him to obtain a copy of the Rolls-Royce publication 'The Jet Engine' there is no better book available that I know of that can give such an insight into the construction and principles of operation of gas turbine powerplants.