MT75 vs N9 propshaft diameter

[loony]

Does anybody know or can measure diameter of N9 propshaft rear section?

I plan to make hybrid for my BEC from MT75 rear section and front section (shortened) from MT75 welded with (shortened) rear section of N9. I already have MT75 propshaft - so this is not a problem, but I want to know if I buy N9 I can make 2-pieces "hybrid" with Ford flange on both ends

I was thinking about Volvo propshaft (somethimes they even got TRT section), but I will be dificult to swap flanges/UJ.
Tomorrow I'll call my local propshaft supplier, but I need something cheap, so "the hybrid" will be the cheapest.