Here is a link to that Carburetor/Idle screw Picture that i was telling you about at work.
http://www.rcuniverse.com/forum/m_5359250/tm.htm
Copy n Paste the link and scroll down near the BOTTOM of the page to see the pic.
Also... here is a link to a thread that has all sorts of useful tuning advice.
http://www.rcuniverse.com/forum/m_5399029/tm.htm