Yes, as I understand it the Plastic Insert makes the HP Deform Better and enhances the expansion! I'm not fond of the Humorous side of this, But yes, some folks will buy that siort of thing and ya have to give then Credit for having the Courage to weather the crap they will hear about it? I'm sure it's Expensive as hell and I do like thier products but as someone said, That $ usually turnes me off or to someone else?
RON L