mains

I'm planning to replace my Mains halyard but isn't sure what size I've after measring it with a venier calipher. For my H326, should i go with 3/8" or 7/16" ? The h320, h326(2002) & h326(2004) Owners Manual is missing this info. I've thought of swapping halyard with the assym but the assym ones...

I have recently replaced the standing rigging and stepped the mast (Isomat) on my 1995 Hunter 29.5 and now have to tune the rigging. Does anyone have their settings from a Loos Gauge Measurement tool for the Uppers, Lowers, Mains and Diamonds for the B & R rig.