re: Rattle

Hi Steve. I made the pockets 7/8" diameter and  7 /16 deep on each side. They are on 3 3/4" centers and the balls on the end are about 1 3/16'' diameter. The center handle is 1/2" and  I just blended the ball on the end with the handle. I put 4  1/4" balls in each pocket and glued the halves together. BB's work but they are not as loud!
Cheers, Jim
ps. I look forward to seeing yours soon!