I'll bear that in mind re the springs Pete...on the 'Nyloc' front the word Nyloc seems to have become a generic term for all nylon insert nuts....good and bad. I bought a cheap asorted pack of nuts and bolts and the nylon insert nuts were useless. ..clearly not 'Nyloc' . By the way I'm wondering if I should replace the springs at the same time....my Tenere spec says I have progressive springs as standard, what do you think. ..? Steve