I have the MXT tracker and I am using Whites eclipse DD coil. I have a 950 and never tried it as of yet. When i bought this machine the store that sold me this said the DD would be better in the desert, but I wanted your input on how the two compare and what you guys think would be better in dry sand VS. a grassy park. I found just by chance what used to be an old trailer park site that even has an empty built in swimming pool. I was thinking about trying the 950 in the this location and wanted input.