Yes, the CAIR can be altered, but take it from someone with two wintec 500's, it's not usually an option. There are only a few points that can be shimmed, and often you need to send it out to get this done. If the problem is not in those few areas, there is nothing you can do about it. Personally, I also think that the CAIR is kind of bouncy. Overall, I think they are ok saddles, but I would definitely go with the wool over the CAIR. I had to buy a whole new saddle for my mare because the wintec didn't fit. It would have cost more than the saddle was worth to try and shim it up somehow, and it still probably wouldn't have fit her.