By altering the gun, you actually decrease the size of the pool, not increase. I don't know where you get the notion that hotrodding an NID makes it attractive to a larger pool unless you replace the action with an AR receiver, barrels with .223 barrel and stock and forend with AR plastic stock and forend. Who pays attention to a bead when wingshooting?? (conceding deer or turkeys where bead would be useful, but a 20 NID is not a preferred gun of choice for either.) If you feel the need to use a tritium bead, charge on, but forget about it making the gun more marketable by doing so.
I agree, I also think that would not only decrease its value but the pool of potential buyers. An NID, while a great American classic, is not exactly in your top tier of American classics as far as collectors are concerned. Or, in other words, comparing their prices, no one is "chomping-at-the-bit" to buy an NID especially one that has been 'modernized.'
