The silver with black back works real well for me, and the silver with blue back works really good for my relatives. I picked up a blue back but haventtried it yet, but the water ithas beenused in with great success is very similarto the water you have shown in previous photographs. However i have never used the big F12, mine are the f7 and f9 if i remember correctly. Do you use the F12, or does that just happen to be the label on the minnow photograph?

How do you fish yours C7? I usually twitch mine like a wounded minnow while doing a slow retrieve. Sometimes its hot, sometimes its not, hehe.