Onhwy61,it's scary, almost like you're in my listening room, you have my testing methods down so well. ROTFLMAO! I guess I'm not alone. Albert, thanks for sharing your experiences, it does seem odd that a power cord could make that much difference on such an impressively engineered piece of equipment as your Walker. I wouldn't doubt you though, because I've heard p/c's make a difference when it didn't make sense before. I'll try to report back to you, but first I'll have to go out now and buy another p/c. As I have an assortment of BMI's and Shunyata cords, but all are currently in use. I can't see pulling one off a amp, preamp, or PLC to test on the SDS as this would affect my baseline. I've kinda grown fond of the Whale Elite Mk II's and they seem an inexpensive enough place to start. Maybe I'll just grab one and try it against the stock cord. It probably will take a few months 'til I iron this one out.
It's funny, when I ordered the SDS, I had no idea it had a detachable power cord. As soon as I saw it, it's just like Audiofile9 said, I thought 'wow, I can make it better.' I'm ashamed of myself. If my family ever found out, I'd be ruined, Ruined I tell you!
BTW, it does make quite a noticeable difference, even with the stock cord. I seem to be able to locate instruments within the soundstage better. I wouldn't say it throws a larger soundstage, but it's easier to differentiate, and pick up audio clues within the soundstage. Almost like you have a better feel for where the musicians are standing in relationship with each other. The bass seems a little tighter and the background a tad quieter.