Personally id ditch the hope m4's, i had exactly the same problems and tried everything and did nothing but throw money at them.
Tbh the best thing i did was to sell them on ebay and buy some formula oro's.
Yeah im about, not so much off road though too freaky with so many bridleways down in cornwall.
Just got a mars led just so i can extend the run time on the front by losing the rear led, atm it dies at about 2hrs ish.
Well ive bit the bullet and ordered me a pair of dragon 2 srs 2007 sidi's in a very funky midnight blue.
Went one size up to a 46 as some reviews suggest they can be a tight fit.
I can't wait!!