I agree. I find it hard to believe that GMS would go to the trouble to machine two liners exactly the same in every way exept .004" on the O.D. I wish the difference were the other way around so it would be tight rather than loose. I would like to believe that someone measured them both a little carelessly when they set up the specs for the Tower site.

Do you think if they are truly .004 smaller in the O.D. I could use shim stock or ? to shim them or am I dreaming?