Taipan Taipan Veteran leaks

I have a taipan veteran in 22. It has sit for a couple of years. I just got it out and pumped it up and it worked fine. However, now when I air it up to 250 bar and it sets overnight or a couple of days it drops down to 100 bar. I do not hear any leak whatsoever. All of the diagrams for the schematics show the parts in order but none of them show sizes for the O-rings. On the accessory page and type in website, it tells you the sizes of the extras that come with your gun, but not for the rest of the gun. Does anybody have a chart of the sizes? Where would you suspect my leak is coming from? Thank you.
 
  • Sad
Reactions: ChickenDumpling