We got to meet with Andrew Pattry, Heavy Touring 2021 STOL champion, went flying and looked at his plane, which is impressive with the reversible MT propeller and the owner produced titanium gear legs, made by The Landing Gear Works, also STOL kit and , VGs we had a great time.

I saw the video and noted he added some weight in the tail cone (like 8lbs....I think ) to move the CG backwards. Exactly how was this done?

I don't know in his plane, in my we added 17 pounds, scuba weights, velcroed, tie wrapped to the tail cone bulkhead.
Have had thisfor 5 years no issues at all