will there be enough metal to drill it out to 12mm??


8" is short, but the design of the ground control sleeve will work well with this length. perhaps what i need for the rear.

you don't want to be using too long a spring because of the extra mass and also less flexibility in adjusting ride height.


the issue with the ground control sleeve for the koni shock body (not sure if this would apply to other brand of shocks using GC sleeves)
is that the sleeve will turn when you are trying to adjust the spring preload. usually using some wd-40 will help and a good strong hand to grip onto the sleeve while you're trying to adjust the perch.
some people claimed to have used ONE layer of electrical tape to make the shock body just thick enough to prevent the sleeve from spinning, this did not work for me because even the one layer of
electrical tape was too thick.

also, mine did not come with an adjustment spanner, so i filed down a piece of flat metal to fit in the grooves on the adjustment perch with some assistance from an adjustable spanner LOL