Charlie, I commend your decision to do your own work. It not only saves money, it increases your knowledge of the bikes workings, which might be the difference between a quick roadside fix and a trip ending rollback ride. When you make a repair, modification, adjustment, etc., yourself, you KNOW what was done and don't have to wonder if the service guy took the extra time to go beyond the call of duty.
As you've seen on this forum, there is a wealth of knowledge readily available and plenty of opinions/advice/tips to ponder. This site is great for TBA and Speedmaster owners. A Triumph service manual was a must for me. I'm not always satisfied that something works, I need to know how, why and whether it could be better.