I did the steble upgrade, lasted just under 18months before it died and I was never over happy with the fitment.
While it worked it was Awsome. My mot guy almost had kittens when he hit the horn on the test LOL
Didn't bother with another in the end, and just went with the same acumen One as shown above. I to use the tin still LOL but I keep washers in it :P
It's much louder than oe but not in the same class as the steble.
Ps I got my steble from halfords, though back then there were a lot of them on eBay etc to.
A mate has Dixie horns on his blade LOL. Dukes of hazards style :P compressor under seat, wired through a relay and about 6 horn tubes in the fairing