Catalac-41 standing rigging diameter specs?

[KnightSail]

Hello,
I'm on a Catalac-41 bought a couple of years ago, considering replacing the standing rigging. Finding there are two different diameter wires presently being used:
2 shrouds: 3/8" (9.55mm directly measured with calipers)
1 Port & 1 Stbd baby stays: 3/8" (9.55mm)
1 Furler/Forestay: 3/8" (9.55mm)

2 Back Stays (masthead, one each to aft corners): 5/16" (8.1mm)
1 Fwd Baby stay: 5/16" (8.1mm)

The boat was built in UK, so likely original rigging was all metric (10mm & 8mm), but has lived most of its 33-year life in the Caribbean, and the present rigging is imperial/inch.

Any Catalac owners, or anyone else for that matter, know what the original spec was, please? In other words, should the standing rigging diameter size be the same all around, or is it correct as described above?

Thank you in advance.