FWIW, I ended up getting the el-cheapo mini gun. Mainly because it included 3 sticks. The TR550 didn't come with any, and the only sticks on the shelf were bags of a dozen 10". Even if they're cheap, I don't like buying something I'm not likely to use, and I've seen plenty examples of 4" 7/16 glue sticks.
Anybody in Colorado interested in a group buy?
Yeah, well, in the moment, it wasn't what I was expecting. And no, it doesn't matter whether my expectations were valid.
And if you could see the inside of my apartment, you'd be asking, "Where does he think he's going to put those?"