It seems all the stay wires are of various lengths.., never know what they were smoking out there in California when they were putting them together.

I use a 10-hole chainplate adjuster. In doing so I had to take off the side adjusters and just use shackles. Otherwise the rig was too loose.
I can go block to block, but rarely do. Also,my Calvert mainsail has four holes to select from, so I can put the hook into one of the upper holes.
Rick