I just got a Grand and love it. I drilled out the RM2 a bit. In one video, it says to have the air hole pointing up so juice does not leak. Mine is pointing down. I cannot unscrew the 510 connector (a dime would not work and I don't have a screwdriver big enough). I can unscrew the center pin but that does not seem to adjust how far the RM2 screws in. How do you adjust it so your airhole points up?