Replace the shiny dustcap with a vented paper one, slap a piece of duct tape over the vent on the back of the magnet, and 95% of the population(audiophools included) won't have a clue they're not listening to a genuine alnico 416 or 515. In fact, i'd be very surprised if many of the altec experts could pick the 421 in a blind test without the aluminum dome in place.

Just my .02.........................