Things I liked:A great product. Had some problem understanding instructions but called Pyramyd Air and Stacy one of thier techs was extremely helpful and even sent me an O ring to replace a part that fell apart at no charge. Thank you Stacy and Pyramyd Air for all your help. Dave Things I would have changed:Instructions and add O ring to the kit. Number 26 on instruction sheet and stretch it over back of the valve guide if needed it works. A bit of a chore getting on. What others should know:Ask for O ring # 26 when ordering kit you may need it.