Spin Halyard crane upgrade

[buchhla]

Hi all, I have a Pretorien 35 that is using the stock Isomat rig. I am just about to start a complete refit of all the standing rigging and while I am doing this, I would like to upgrade the way my spin halyards exit the mast head. I currently have 6 halyards on the boat. Two mains, which don't relate to this, and then two head sail and two spin. The way the sheave box is designed right now is that it is located directly under the forestay toggle with all four sheaves on the same axis. My issue with this is for extended offshore cruising, there is a ton of chafe caused by the spin halyards resting on the forestay when on the gybe opposite of the halyard being used. Most of the race boats I have worked on have higher exit that the forestay so you do not have this issue. My question is should I have somebody build a higher exit box for the two halyards (not positive there is room, I need to climb the rig with a caliper and a camera anyway to get my parts list for redoing the standing rigging anyway) or could I machine some sort of crane that I could bolt to the masthead and then hang external blocks on to that would move the exit forward say 2" so it would be in front of the forestay?

any ideas on how I can improve this?

Thanks,

Lauren