With regards to the Vest, I too had my G-Tube placed in December and I have had no problems regarding the Vest. After a few weeks I was back up to the normal pressure and frequency that I was before. I used the "Block" for only a little while, it definitely helped if it actually does hurt to do the treatment. Regarding the clogging, I doubt that it is because of the Vest. It could be the bag or a kink, or that there is an obstruction that is in the tube that allows water to pass but not the thicker formula. My doctor actually told me to flush it with Coca-Cola if the tube got clogged or was slightly occluded. He said it dissolved everything (glad I drink a lot of soda? lol)