I don’t really service many of my blasters the higher stress ones like my CYMA custom that is 350fps 36rps I have serviced.
Generally anything 30rps and under you don’t service unless it’s showing signs like loss in fps, starts sounding different or chewing through batteries more… return springs going is usually a perfect time to service!
I basically recommend not touching it if it works as expected. Leave it until it needs a return spring or something. If built right that is.
I do have one of my favourite game day blasters in the category that I need to service it, and haven’t used it in a while because of that… it works fine… it is a 340fps 30rps blaster that has just been flogged… and I’ve never opened it since building it… still works fine I just would like to service it.
Might make a neat video at some point. 
