You'd have one heck of a thick barrel band front to back on a 7.5" barrel if you were going to mate it up to the ejector rod housing, even if you used the longer 5" ERH from the 10" guns. The classic Linebaugh is the only way I'd go personally. 5.5" with a banded barrel and patridge post front sight. When you see one, there is never a doubt who built it
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"Better to Remain Silent and Be Thought a Fool than to Speak and Remove All Doubt"