Aluminum can for the win. Shim around the loose part. I did it in a hurry to see if it would work, it does amazing. It's held in place by the bolt, I'll go back and do a better fit now that I know it's worthwhile.
Just joined up for that reason. I split my time between north little rock and Clinton. I have a couple of places to shoot just north of jacksonville and one just west of ward. Need to connect with Arkansas_airgunner and PowerDan.