How would u rank a cromoly frame over the 6051al or the 7005al frames as far as 'durability' not the 'weight'? I have an older 99' khs fxt sport f/s cromoly with rim and alivio derailer upgrades and ride with friends that have a ds2 or coil ex, v3 or g-3.0 ext.. and have seen some of their frames crack while mine keeps going and i'm heavier that alot of those guys. truth is my khs is lighter than some of theirs that have all the bells and whistles. How would u rank the frames and what do u think of the khs brand?