There are a number of advantages to the Teague Liner versus normal sleeving in look and feel. 1 - The original barrels are retained with the damascus pattern that can be refreshed if you so choose. 2 - Barrel weight can be adjusted to match the originals.
3 - Choke constriction can be specified just like a new set of barrels. 4 - Chamber length can be 2 3/4" giving you more options in light pressure loads.
The Teague liners will keep the gun looking completely original. If it were my H&H, I'd believe it's worth the expense.

"I hate rude behavior in a man. I won't tolerate it" - Capt. Woodrow Call