+1 on the thumbscrews. I got mine from Brent at BonnivilleAmerica.com. They made it very easy for me to tweak and find the best setting for the bike. I also bought a manometer to balance the carbs. I check them at idle and at a little above 3K where vibration used to be noticeable. My bike has never run better than now after 3.5 years and 15000 miles.
I also agree you should have a shop manual. At least the Haynes which is loaded with info. I have both the Haynes and the Triumph shop manual.
