With regards to the S557, I thought: "What a great toolset, without much duplication, in a 85mm package. Too bad it's probably a Swisschamp-like brick."
I looked it up on YouTube, and it is not as thick as it seems like it should be, considering what it has going on.
Also, I carried my Explorer today in a belt pouch, and it was like it wasn't even there. (the smaller version of the cordura one I linked to above) One key for a comfortable belt pouch is that the top of the loop is near the top of the pouch, so it isn't digging into my love handles whenever I sit down. So I figured I can carry the S557 the same way, when I decide to carry it in the warmer months.
Syph: I'll let you know what I think of it when I get it.
jerseydevil: ditto, although I don't think you need any validation at this point, as it seems you're quite fond of yours.