Hey thanks for the replies guys, appreciate it. I have only fished it one time and have to say it was both fun and discouraging. The thing is trickier than one might think to get working properly. The manufacturer says 10' below the planer, others have told me as much as 40 or more feet. I recognize that this depends on several factors (lure type, water depth, line diameter, etc.) so will continue experimenting. Thanks again guys.

jed