Westwood wrote on Mar 12^th, 2015 at 5:19am:

I generally go with my wife to Beaverhouse the end of August.  I have one of those fancy thermometer which measures water temperature every five feet.  Beaverhouse is a large deep lake.  When I checked the temperature, it was 50 degrees at 30 feet.  At 45 feet it was around 42 degrees.  So there really isn't any need to go much deeper that 35 feet as trout will come up to get a lure.  The Rapala tail dancers will go down to 30 feet when they are trolled.  If the water is really deep I have even used 6 ounce weights to get down a little deeper.  Depending on your speed a six ounce weight doesn't go much deeper than 45 feet.  Of course, how deep a lure runs also depends on how much line you have out.  I found that in 50 feet of water a six ounce weight is not getting caught on rocks.  I generally use a flutter spoon with the heavier weights.  For trout water temperature is really important.

Wow, 6 oz.  Really?  That seems like an awful lot of weight.  I also have one of those Fish Hawk's so I can read the water temps. but I've never had to use more than 3 oz to get down into trout zone.  That being said, water temperatures can really vary from year to year.  Last summer 35' was in the 50 degree range which is prime for trout (I believe 48 - 53 degrees is their ideal zone.)  But a couple of years back I remember that I had to go down to around 45'.  If lakes are in the same watershed, I haven't found much variance from one lake to another but if they're not then it can be different.
As for deep diving jerks, I do carry a few Taildancers and have had some success with Walleye but I don't like all that drag that you get with a long billed deep diving lure.  Anyway that's just me.  I just wanted to get feedback from folks who like to fish with flutter spoons on how best to utilize them.