Welcome Paul and congrats on your 3D! I love my 3D and like you, found the Smokin-it to be perfect compare to the other similar styles. Especially for the price.
For your smokes, since you have a 3D, you can try ramping up your temp as well, start with 150-175 for about 45 minutes then to your cook temp. This isn’t my process, I read about this on the site somewhere from a few that were recommending it. It has worked well and leaves you the chunks of charcoal at the end of the cooks.
Anyhow, enjoy that smoker and welcome again!