........Used a Groundhog for years but sold it a few years ago.......I was missing it .......so a while back I started looking for a replacement but was desiring one with Modifications.........Luckily I found a Near Mint Garrett Gold Hunter..........VERY SENSITIVE AND HOT.......As far as I can tell this detector is very similar to the Gold Scorpion except that it does not have the Motion Discriminate Mode......I AM VERY HAPPY WITH THIS GRANDPA........LOL............JOE

That looks alot like my old Coin Hunter VLF/TR.
It's a groundhog/15kHz. Same search coil, too. I really like the way that you've got non-metal lower stem and hardware. I bet that does help with the sensitivity. I'll take some pics of mine when I can get around to it(we travel light/it's stored).
Happy Hunting!