Thanks everyone for your great information and input.
So my take is the Timberline door design does seal smoke well and force the exhaust thru the designed downdraft rear exhaust. That is what I was hoping for. Sounds like with time you might have to clean and or re-insert the seal pins nto keep it working well. To be expected.
I know I could easily add the aftermarket door seal and improve on the Silverton 810 as received but I am disappointed that Traeger did not have a passion for their product and make it better on what I consider a mid-level offering in their product line. I am an engineer so often think of cost, value, and customer satisfaction. My take is $10 USD or less they could have added a great door seal. Charge me the 10 and make it right. Sometimes it no fun knowing more and thinking too much.
Now my problem with the Timberline is I have to consider adding time and money to upgrade to RemiEs true insulation project. As the Timberline is really double walled with air gap and not insulated. Traeger please charge $50 more and add true insulation so I do not have too
. Also add a 304 SS exterior material option for $125 additional. Save the paint that scratches and can bake off. It really is easier not to have too much information and overthink everything. (My nephew is perfectly happy with his Ironwood 650 as received including the Traeger air temp and meat probe.)
PS. Should I buy a thermal imaging camera to collect test data before and after insulation work as I only have a laser infrared laser Temperature Gun. Thankfully no as this fine group already has the information available. This group is great at helping and empowering me to spend more. The benefit is I never have any issues thinking what my lovely wife's next gift will be.
Thanks again
Best regards
Spanky
(Path forward + ??? Timberline 1300/Yoder/Memphis/Coyote/Twin Eagle or possibly save the money and purchase "liquid smoke" and meat tenderizer and have the wife start cooking again)