8.5" is sure a lot of fun but I find 12.5" more practical and versatile, 1 more round than the 8.5" and the normal forend assembly and tube fits 12.5", no need for extra small tube and forend.
12.5" norinco barrels placed on an 870 is my fav combo. I bought one of those old norc's for that very purpose back when they were available - got rid of the rest of the shotgun.
Gun control defined: The theory that people who are willing to ignore laws against rape, kidnapping, theft, and murder will obey a law which prohibits them from owning a firearm.