Yeah, the key is a nice clean burning fire. I get more smoke out of mine than oldschoolbbq, but mine is still blue. If I get white billowing smoke for more than a short time, I'm in there with a propane or mapp gas torch getting things hotter. It's normally not a problem though. If I do have any green wood that I am using, it gets mixed with whatever I have on hand that is well cured to make sure that it still burns well. My smoker is a giant homebuilt pile of bricks, so I'll have a bigger fire to keep things warm than oldschool, but the key with me is I've learned how mine behaves. I run mine different than he described ITT, but I'm working with my smoker's characteristics. I'm also a bit more caviler in my attitude about heat control, but I still have people regularly tell me that my BBQ is better than stuff from a restaurant.
Play with your smoker and learn its characteristics. Do it without any food in it some afternoon. You built it, so it may have some quirks that some of the commercial smokers don't have. If they exist, learn what they are, e.g., if you can't keep the temperature as stable as others can, learn to work with it. I personally pick a range (the range varies with the kind of wood I'm using), and if it gets a little above that range, I wait until it gets a little below that range before I throw more wood on. If you can get great heat control, then great, use it. The key with good Q is time, and offsetting a short temperature spike with letting the temp drop a little further to keep it from powering through the plateau seems to work pretty good for me.
Also, I echo the sentiment that you should stick to cured wood for now. I've been a firebug all my life and have spent many a night up where my only heat is a fire, so I'm pretty good at getting a nice clean burning fire. Because of this, I know not only how to get green wood to burn clean, I also know that it is harder to do so than it is with nice dry wood.