I'd say go ahead and mount them up, but if he really is just trying to get you to buy new bindings I'm sure that yours would magically fail the test.
Even if they do fail, the 900s hole pattern should be the same as newer sollies (correct me if I'm wrong) so you could throw on some 914s or 916s without redrilling.
Edit: Damn, you guys are quick!
I think that the human mind is unique among all other forms of life in that it can spontaneously create unique thoughts and provide unique behaviors. Instead of rewarding that uniqueness we, for some reason probably because of cultural and social necessity, we chastise unique behavior and reward conformity.
Bookmarks