Re: Not quite right

Whither or not the projector has sound capibility has nothing to do with variable frames-per-second.
You want a sound projector capible of 16fps & 24fps play. All (that I've worked with) multispeed sound projectors have a sound pickup by-pass built in.
Is film you have single or double perf? That is, does it have holes along 1 edge or both. If it's both then you can use just about any projector, if it's single perf. you will want to make sure the projector you get will feed it or have an adaptor set.
I would reccomend contacting your local schools and see if they have a projector or two laying around. Since VCRs, Laser Dics, DVDs and Computers started coming out more and more 16mm projectors have been collecting dust.
The main thing you REALLY want to look into is once you found a projector that looks right, find out what kind of lense it has. Who made it and how.
In the 1980s lens manucaturers (espically in Japan) started using computers to grind the lenses, these are what you want. Then with VCRs and such the need for 16mm projectors dropped, so did their prices. Schools ended up being able to but high-end projectors cheap.
I've seen the same film strip on 3 different projectors, only 1 had a lens ground by a CNC machine and you could have sworn it was a diferent print than the other 2 times I watched it.
Good names:
Filmosound
Eiki (personal favorite)
Kodak
Bell & Howell