Cutting New Halyard Exits

[CJV]

Hello,
I have a Tartan Ten and I want to cut new 4 or 5 new halyard exits in the mast. All lines (2x Headsail, Spin, Main & Topper) exit at the base of the mast today, but I want them up higher for faster sets & douses. A new main exit is not strictly needed but would be a convenience as the T-10's main is hard to hoist from the cockpit.

I'd like advice on the placement, distribution and finishing of these exits. I have emails into the spar builder (Bay Sailing Equipment) and Tartan Yachts, but no answer yet.

Someone suggested I check out the placement on the J/105's Hall Spars Mast. Another person suggested evenly spaced exits all around the sides of the mast to evenly spread the loads.

Thanks in advance,
CJV
Huntington, NY