I too had a Weber Smoky Mountain. I also had the BBQ Guru that regulated temperature. It does work. For me, the problem was all the work!
You may be surprised at how much you use your 025. I couldn't believe how easy it was to use my 025 on a frequent basis. I had a friend who referred me to Cookshack. I owe him. (Kevin, I hope you see this.)Just take good notes on each smoke. After a while, even your friends will say that they know of no commercial BBQ joint that is as good as your product from your 025.