Can't help with the depth finder, but the crappies are starting up good in the Six Mile area. A buddy and I got 24 yesterday and 31 today. All nice big slabs. We were long lining in the Oak Hill area between 8 and 20 foot. They were scattered. We were using 1/16 chartreuse jig heads with a white/chartreuse curly tail grub. Didn't find them bedding up yet, but I hear some have.