Nero and SKB,
I was under the impression that the problem with the smaller martinis is the diameter of the barrel. If the model 12 has a thicker action it is moot if the barrel is the problem...... I not saying I know what I am talking about, just asking questions to learn.

Also is the waters too long to slide in and out.

I would love to do a 7mm waters on the martini I bough from SKB.

Jerry