I have talked to Glenn a number of times and his right hand man Scott. They are both very helpful and good guys. The real nice thing about SM cards is that they continually are updating them. I asked Scott about if they are going to offer some sort of upgrade program for existing customers and he said he would have to talk to Glenn. The marsh changes so often that I would be very interested in being able to trade in my old chip for a newer one.
As of now I have three chips from SM and am very happy with them. I like it when my chart actually shows me being on water and not land when going through the marsh.
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