Help: Diameter of SR500 top tube?

[KingHerald]

I'm thinking of 'goose necking' my SR a couple of inches, make it longer, lower, and fit some longer forks.

Update:
Incident over, I found the size elsewhere, 76.5mm (3 ") and we don't have steel the right size on my ship. Over to plan B....

[Guest]

Cool you found the size; I'll leave it in case anyone else is hunting for the same info one day.