What I did was not unsimilar to what is shown in the posted video. Definitely protect the face of the cabinet with something soft enough not to scratch and firm enough to not allow a dent in case something goes a little wrong. Carl at Alon/Nola used an everyday product called Mortite rope caulk to seal the drivers in his acoustic suspension boxes, and it was a bear to peal a driver away from so proceed with caution - it is not a race!