Well, got a 9mm one, fitted whilst changing my radiator today.
Surely you can't change the belt without removing the radiator, can you? There's zero room! Quite chuffed, the radiator was a totally unknown factor as it came with the motor when I bought it. HURRAH! No leaks! Shoulda seen the old one, they are supposed to have fins! Top half of this one just had the water ducts & the bottom half (talking of flies) had more insects stuck in it than fins. I'm amazed the Landy ran at a reasonable temperature!