Pit Boss Austin XL Burning Bottom

Would greatly appreciate any wisdom from my more experienced peers. Charred ribs yesterday. I don't have a bunch of experience with Ribs.

Running an Austin XL, smoker is cleaned regularly and using fresh pellets. Owned for about 3 years and have had some great cooks on it. I don't really smoke over 250, usually at around lowest temp-225.

With bigger pieces of meat like Brisket and Butt; by developed bark/wrapping time, the bottom is burnt and charred as if it is cooked direct heat.

I have tried many different spots on the grill but mostly cook on the right side front or back, because this seems to lead to the least amount of burnt bottom. I have tried flipping, which mostly works, but I would prefer not to have to do this, because flipping often times can mess up the presentation. Cooking fat side down.

Yesterday I would say I ruined 3-2-1 ribs for a dinner party. The flavor was great, but the bottom was charred. I had the same experience with a Christmas Brisket a year or two ago. I know I can do better than this. I am now looking for the solution, and it seems there is one.

After further research it looks like these Pit Bosses have some serious temp issues that have been mostly eased with two modifications. Has anyone had success with a 'Smoke Like a Boss' Flame Tamer/ Heat Deflector Mod?

Did this solve your issues with the burnt bottom?

Much appreciated.

I ordered these two after doing some research.

4 Window Flame Tamer (Patent Pending) – Smoke Like A Boss

Heat Deflector/ Airgap Mod (Pat. 966,805) – Smoke Like A Boss