I wanted to share a tip that might save someone time in the future — especially if changing rigging out with the mast up.
You cannot use the 3/8″ Hayn Hi-Mod eyes for the upper part of the lower stays as they will not fit in the tang together and interfere when tensioned due to the shape of the eye.
If you use a combination of a Hayn and a Sta-lok brand fitting on the same tang, it will fit with about 1/16″ of clearance.