Re: What do you guys think of this barrel tuning system??
Any pressure on the barrel from any direction someplace near its mid section may improve accuracy. But only if the pressure is exactly the same force and direction for each shot. Which means the shooter has to hold the rifle with exactly the same support and pressure between the rifle and the shooter's body and/or rest for each shot. The pressure differes between benchrest postions and field positions. The flimsier the forend is, the more critical the holding pressure becomes.
Such things have been tried for over 80 years. None are repeatable across all shooting situations. A completely free floating barrel clear of the forend by 1/16th inch (sometimes more) hanging out of a properly bedded receiver has proved most accurate and repeatable. Free floating the barrel means the pressure on it remains constantly at zero regardless of how the rifle's held and/or supported.
The above aside, do what you think is best for both you and your rifle.