Hi All, Well, as I believe I mentioned on this list, I did indeed try the BT-338 receiver with the case for it from Executive Products. And, in the three or four times I used it with my PK, I couldn't really tell any difference with the receiver on my shoulder in the case, or with it just in my purse. Now, I think their case is quite nice, say for someone who doesn't carry a purse or some other type bag in which to put the receiver; however, if I can get the same results with the receiver safely tucked in my purse, then that is what I'll likely continue. Just for the fun of it, after acquiring satellites on my way to the bus stop with my Blue Logger and PK, while on the bus, I then took the Blue Logger off my shoulder and put it in my purse. (I already knew I couldn't get a fix with the Blue Logger in my purse right from the start.) And, although I was always able to maintain a fix, and a reasonably accurate one, I would often be told that I was on the cross street, rather than the one we were actually traveling down. Of course, I do have that nice strap that Sendero provides with the PK, and I know I could just put my receiver on there; but, well, guess I just got used to using the PK with that smaller strap that just seems to fit the unit. I'm sure I'll use the heavier strap for the mPower when I get one, though. Oh, I haven't purchased the Executive Products case for the PK itself yet. Although, what with now taking the CF cards out of the unit when we're not using them, I'll likely get that soon as well.