Yep just asked he said ok! the only thing is the center of the connector will not be soldered for dripping the way it's done on other units,this is done because the 401 needs the air flow! but i've been using the chuck heavy for over a month and so far has not been a problem with leak threw. although i have seen a few faint dabs of juice on batteries at different times. also if he has not made your yet give him a pm maybe its not to late!I would have ordered mine with a 401 connector but he didn't have it available on the web site. How'd you get yours with a 401?