If you don't want your line to twist when trolling spinning things, like fishflash and herring, you have to use lots of 6 bead chain swivels - I use one on my main line, one on my leader, two on the fishflash, and one to connect the diver to the fishflash - 5 total! The reason for this overkill is weeds - you get lots of goop on your line in muddy bays like the Willapa and Grays Harbor, and if you rely on only one or two swivels, or on multiple single swivels, even high quality ones, the weeds will plug them up and you will get lotsa line twist. I have put over 500 days of trolling on my Power Pro in the last 5 years I have been using it, and I have never had line twist problems.