I can try to help you if you want to use it in the horizontal position.

Put the assembled gun upside down on a table. Extend the barrels about 18" over the end of the table.

Hang one tyne of the fork in the barrel. Hang the tyne that goes in the barrel, not the one with the dial gauge. Adjust the dial gauge until it reads zero.

Push the gauge into the barrel and read the wall thickness on the dial gauge as it goes down the barrel.

This is how to do it with the Truth Tool. The Manson may be different in some details.

Best,

Mike

Last edited by AmarilloMike; 01/29/11 10:26 PM.

I am glad to be here.