Is there a difference between air and surface servos?

[JERRY2KONE]

That looks like an interesting pair of servos and could start a good debate. They both look up to the job from the specs, and that note about using Nmh batteries ONLY is confusing. Restricting it to only nmh seems kind of weird, but maybe BrianG can come up with a good reason. Either way I would think they will both work, but at $120 a pop you do want to know if there are any issues using them in a Savage. I don't see why either one wouldn't work. Pretty powerful servos. Have you tried looking on EBay for maybe the hitec 7955?