Mike

Well, if my experience with a PEG is any guidance, your PEG tube is fast approaching the end of its useful life. I am now on a 6 month replacement schedule after going through 2 PEGS since March 2009. Both tubes started to leak between the stomach and intake valve. I had only used Jevity in them as even Ensure was a little thick for the gravity bag and had to be syringed.
Unfortunately, I can't give you any more advice based on experience since my scarring and the amount of base of tongue taken out don't let me do any food, either solid or liquid by mouth. If I ever get to your stage again of being able to do 100% oral intake, I'd get my PEG out after two weeks but that's just because I hate it and two weeks seems long enough that 100% oral intake was not a fluke. Congratulations on being able to swallow.
Charm