You really need to read the original L39 thread started by Paul Gray

http://www.rcuniverse.com/forum/m_13..._1/key_/tm.htm

There is also another thread on www.rcmf.co.uk

You will need to join to look at the jet stuff and then the link is below

http://www.rcmf.co.uk/4um/index.php?topic=29593.0

Most of this info by Lozza is also on the Paul Gray thread but you will need to find it (I find the search function very poor). This thread is a lot smaller and has some good info and ideas.

I am building my model at the moment and will post all the pics and info at the end of the build. I thought it was better this way for other L39 builders as I have found the info I need on these two threads but it is sometimes hard to locate.