– ….are you recording or not??!? WAIT FOR THE HUBS TO COOL DOWN Always wait for the hubs of the trailer to cool down before submerging it into the water. This action will prevent water from entering into the hubs and will extend the life cycle of the bearings. ROYDHOUSE MANEUVER This is another equalization method that does not imply nose pinching. It is a variation of BTV, initially described by Noel Roydhouse, a New Zealand doctor. It is performed by constriction of the soft palate muscles in a way that the uvula moves upward and forward while at the same time, we move our tongue and jaw as if we are trying to make smoke rings.