I reconditioned my KYBs had spare set of originals was pretty cheap compared to new set and warrantied for a year, the guy assured me they were as good as new, I did it myself (the swap) and looked in yellow pages for reconditioners, the only hard part is when you put them back in as the swing arm needs to be pushed down about an inch to fit the shock in, I did this with a long bar and is not very hard really but you have coilovers so is different to mine, as to driving on them I can only imagine bad handling and more damage to shocks but good driving and going slow over rough stuff will help, I dont think they will break but dont take my word for it.