Has anyone used a sail stacker,? I saw the Doyle Stack Packer II at the Strictly sail show last week in Oaklaand, and it looks very neat. They must be popular as I was told it would be 4 to 5 months befor they coulg get to it, then it would be a one week turn around to attach it to my sail. All for only $650.Seems like a good price, any experience with this model out there ?