I seen you, i was all over that lake jigging with not much to show other than some gills and a few small perch, was tough out there today. I jigged the uncharted hole you're talking about and only found small gills but i did pull a walter out of it just before it froze. Ice was only 3'' over there, i fished the edge of the drop off in 15-20 fow but it gets to 25' deep or so but there were tons of air bubbles in the ice over the middle of the hole so i didn't mess with that area only having 2.5-3'' of ice