DH drops generally dont exceed 5-6ft in DH racing due to insurance issues.
He does state -
yeh this is simon. i would have upgraded but i couldent afford it. how thick oil should i put in as i way about 11 stone and i want them to be reasonably hard to tackle bigger drops.
So he's on about bigger drops - i wouldnt go over 5ft on them.
My bro had some on his 2-Step, used them twice, now they have seized up and will have to go back in the new year.
J