http://www.performancecat.com/manuals/nacra.pdfManual for your 5.2.
1. Yes
2. Sounds like the chainplate is the style for tensioning the forestay.
3. Is your setup a ring lock or a wire lock for the main? See the manual for further detail. My 5.2 used the wire lock. There is a small hook ball on the halyard wire it catches on a "fork" that is mounted on the front of the mast.
4. Most have to retro fit for double trap on 5.2. I had gromlets put in just aft of the dagger on each side of the tramp. Used an eyelet on each hull to run the bungie to each gromlet and under the tramp. Mounting the captain's trap through the stern beam does not work because it interferes with the main.
5. Do not remember.
6. Murrays or Sailing Shop Pro
7. Slop in the rig when idle is a waste. Not so tight that will not rotate.
Good Luck