For 2X6 or 2Xanything runners, has anyone ever tried what metal stud framers call 2" track, which seems like it would wrap nicely around the bottom of your skids and be easily fastened on the sides by sheetrock screws? I'm sure you know what I mean, Scott. I see it a lot in my work (electrician) but never thought of using it until after I put on the heavy metal U-shaped stuff I found in my barn.
I don't know where they buy it but don't think HD has metal stud supplies. Any drywallers or framers on this site? You could help me there. I think it measures 1-3/4" or so, which may make it just about right for wrapping a 2X6. It's very light, also, and requires only tin-snips to work on it.