I am using 3mm. I have used 7/64" spec 12 for 15+ ish years. With the spec 12, I kept the boat rigged up 24/7. I believe I changed them out once. Didn't have an issue, just changed before I did.


Cheers...
Scott Tuma
P 18-2 Mod Turbo "FrankenKitty"
Tornado Classic "Fast Furniture"