If you read what he has wrote, conventional methods require too much time and haven't worked for him (for whatever reason); so he is trying to think out of the box.
My thoughts:
I don't believe you can achieve plastic deformation with low pressures in a relatively short period of time; as you increase the volume of blood in a given sized container with it no where to go, the internal pressures will increase which demand greater external pressures to overcome the push back. If we theorize that you have a particularly tough tunica and that has been the obstacle to your growth; I can't imagine the pressures needed to reach plastic deformation without some major trauma and let alone keeping the needle in place. I hate to be a naysayer but I think this is a very risky procedure to be done by an individual without some qualified backup person on hand in the event of fainting or other mishaps.