Hairy Clipper et al:
Shooting Sportsman magazine, Sep/Oct 2001, starting page 72, "Measuring MOI' by Don Amos. This is a major article supported with good pictures, dealing with Rocketman's updated/upgraded/up-engineered MOI measuring tool. THE early "MOI" measuring tool and explanation is shown in Gough Thomas Gun Book...but Rocketman carries the idea and tool/device design far forward.
Shooting Sportsman magazine, Sep/Oct 2002, page 18, "Reproducing Gough Thomas's Device" by Thomas Hamernik. The title says it all....a one page article with a picture of the device.
Unstated in this thread,(so far), is that Rocketman has kept a record of the many guns he has "spun", which gives his words and comments just that much more value.
Hope this helps.