I am a newbe to this forum but not detecting, I have an older Deepseeker Marksman P.B. VLF/TR 4 pin plug with a 7.5" co-planer coil. Does anyone have any experience with this MD and what other coils would work with this unit? I currently use Garrett's GTAX1250 and GTA500 often but never really understood this unit so any help would be appreciated! Many thanks to everyone and happy detecting!! Ray

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