I bought a small one at Michael's the other day thinking it'd be useful for ropes and what not. Well it's fine with the smaller diameter ropes (made a mean tassle LOL), but the larger ones come out all eaten up. I used choco-pan (the little sample they sent me) and the fondant is NOT dry and I kneaded it until it was very pliable.. I lubed up the opening and everything.. is there anything I can do to make this work? Or is it just the gun I have. It's small and metal and you use it like a hypodermic needle (for lack of a better explaination.. LOL). HELP!!!!!!!! I don't want to be doomed to rolling out snakes for the rest of my days.. 
I think I have the same one you have. What I noticed was that if my hand shook a bit because it was hard to extrude or I was moving too fast that I got little dings in the rope, like a small kink. Is this what you mean by "chewed up"? Try holding the gun vertically and letting the rope hang straight down, then be sure you are pushing slowly and steadily.
This sugarcraft gun from Beryls will work better: http://beryls.safeshopper.com/216/7424.htm?961
I find that anything you put in it has to be very, very soft. When you think it is already soft, knead some more shortening in 
This is key to making things come out of it looking good.
Thanks everyone! Just another excuse to get a new toy.. LOL
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