yep, have an FX 2000 in .177 great rifles, easy to work on, i had an FX saber tactical which i have just sold as i preferred to keep my 2000. They do occasionally leak but really easy to fix, mine leaked out of everywhere when i bought it but since putting in new seals approx 5 years ago i have no leaks at all.
One thing to bear in mind if you strip it , make sure your remove the two grub screws in the side of the air cylinder ( one grub and a locking one on top of it) otherwise when you knock the internals out you will leave a score mark right down the inside of the cylinder and the rifle will be knackered. good luck with it , they are great.