I know this topic has gone through the wringer many times...but I'm always ready to hear opinions from some of our resident beaver pros.
I'm a rookie snareman. No doubt about it. I do 90% of my beaver trapping with 330s, on a 48 or 72 hour check.
This past season, I started running an additional snareline on the river...and condensing my 330 checks into one day, every 72 hours versus staggering days.
The snares are working well for me on the river, where I had a very hard time using bodygrips in the tides. I don't have to worry so much about theft either....so I like that very much near the end of the season when folks start fishing.
Here's the setup I have been using.
-60" 3/32 snare with washer lock, whammy and end-swivel....
-18" stake with stabilizer wire
-72" snare cable extension
I set about a 10" loop, with the lock at 12, and just a "tad" of guiding. I control the speed of the snare by bending the tip of the support versus moving the lock around the clock. It seems a little easier for me...and the snare is stabilized better that way. So far, it seems to be working very well, and I have few snares knocked over. Most are set on dry land, above the high tide mark, but with plenty of cable to allow the beaver in the water.
I'm going to rubber tubing versus whammys on all new snares I've been making. It seems to work just as well...and is cheap as dirt.

I like the snare rigged this way because I can have them all premade, and all I need to do is loop them around a sapling, stomp the stake in and go. I can carry 50 or more, all rigged, in a 5 gallon pail. After a catch, I can cut the snare from the beaver, throw he whole mess of cable and parts into the compartment in the bow of my boat and sort it out and rebuild it when I get home.
I do have a little lock damage with the washers...especially when rigged as the one in the photo with the cable having a 90 degree bend in it....but I like that they lock down tight. I've held more than a few by the tail.
I am thinking of trying reverse bend locks....and maybe even smaller cable....ala Newt.
How about some comments from the pros on your setups, and why you use what you use?
Buzzard, Jacko, Don Wolf, Newt?