lanyard pretty much nailed it. I had some people asking about this on Facebook too. It is an older Mallard model. Like I said, I bought it with a hole in it and had it fixed up. Has been stored in the garage since I have had it restored.
I'm pretty much the same way. 3s most of the time. There are a few spots I hunt for woodies that when they decoy they are super close. For that spot, I sometimes use 4s.
I might play around with my shim kit this weekend. And thanks for the advice Quack. I have all of Aug to practice mounting. Hopefully my wife is ok with that.