it had just been barely leaving a film on the fork tube, so i was going to get to it this winter. well to my dismay, i found a very small puddle of oil on the ground this morning after last weekends ride. so...she has failed me. so, attempt to do them myself having never done them before? or just take it to the shop? what is the cost difference in doing it yourself vs the shop? and is there a step by step on here or in writing somewhere?