I tried the PTG route over 6 years ago to no avail. It is some of Dave Kiff's rainbow stew and snake oil to slip$$$$ out of our hands. This follows along the line of his other products and marketing techniques. Save your money and time for better products.
If you like it buy it. Somebody is always kicking something they have never owned. Armchair experts are fools looking for an audience. Find yourself a good smith, get a premium barrel and let him do his magic.