i have one with a short cable, but when you lock up the brakes, they don't unlock. i will sell it though. it has new moose racing pads. it may just be a spring like yours.
hey, you could get a hydro rear setup for that price on ebay. don't spend 150+ on cable brakes! that's crazy! i bought the rear hydro setup new for 185 shipped!
I'm going to hold tight on buying anything right now. I'll re-post when I'm sure I'm going to buy. (I'm going to watch a couple hydro auctions in the meantime.)