I have this 51 Aerometric and I noticed that when I shake it up and down (lightly, i wouldn't do it hardly) i hear a sound. It feels like (doesn't sounds like) the ball inside a spray paint can. Is it normal? I don't think so, but, if it is, i will have a much calmer trip this summer...

Thanks

NOPE, sounds like the aero tube have rotted out and come loose... time to send the pen to be restored...
I use Richard Binder or Ron Zorn for new aero tubes... I believe they are the only ones who are producing metal replacements instead of using plastic tubing.

If I buy the tube, can I replace it myself? If it's not possible, I'll send the pen for fixing as soon as I'm back.

Thanks

Being an Aero, could it be that it wants to take off? ...................bad joke