We just did our routine fire curtain check and noticed that the piston bar on the descent control pistoni(terminology is probably off. Someone please correct me?) was rather dry. We don't feel like it should be that dry. So, with that being said is this something that can be fixed in house or do we need to bring in a professional company? I'm assuming we can just add hydraulic fluid and go about our business but really don't want to screw anything up. If this requires a professional company does anybody know of one that handles this type of work in the Arkansas, Louisnania, Oklahoma, or Texas area? Thanks in advance!! Edit: just found out that the piston is called a hyrdaulic dashpot. Learn something everyday if you just pay attention.