Hi there. My husband is toying with the idea of finishing the HVAC ductwork in our basement himself. The situation is that there are already two vents cut into the ductwork in the ceiling, but we had to frame in and drop the ceiling to incorporate and close in a load-bearing beam. Before we put up the drywall, we need to bring the current vents down to the new lower ceiling level. How should he do this? Is there some sort of connector to do this? How hard will this be? Can he do this himself with materials from Menards or Home Depot or should we just hire a professional?