Has anyone ever put one of those distress inserts in the barrel of your squirrel calls?? Kind of like the squirrel buster that Primos makes. You blow through the exhaust side of the barrel and make a small distress call. Thought about adding to my one of my calls and seeing how I liked it, but I'm just not sure that it will look all that good or I'll have enough clearance in a 1/2" bore. Any idea on dimensions of those things or where you can find them?? Thanks.