I've searched the archives, and need more info on two parts of a project on a 1990 Hunter30G I'm adding a rigid boom vang and am running the control line, topping lift, spinnaker halyard and outhaul down the port side which came equipped with organizer, line clutches and winch only on the starbard side. The port side is supposedly set up as a mirror image to the starboard side, with embedded aluminum mounting plates. I think most of the midsized boats of this vintage were so equipped. 1) I purchased a Garhauer four sheeve organizer, same as the orginal equipment. Most of what I read in the archives about mounting new hardware says to drill and tap, using 1/4" x 20 machine bolts. The Garhauer organizer comes with monster bolts, 5/16" diameter, protruding 1 1/2 inches below the bottom surface. Anybody installed one of these? Drill and tap away? There is no access through the headliner from below to install a backing plate and bolts. 2) Anybody know how big the mounting plates are in the aft section of the cabin roof (adjacent to the companion way)? My starboard rope clutches are mounted far enough forward to feed the cabin top winch---right up against the dodger window (yes, I know the dodger came afterward, but you get the idea). I don't need to use a winch on the port side, so I'm using Spinlock power cleats instead of clutches. I'd like to mount them as close to the aft edge of the cabin as possible. Also, on the advice of a Brion Toss article, I want to move my traveler control line cam cleats to the same location. Anybody mounted hardware in this area?