Filmshooting

The lense can be detached from the projector for cleaning. The glass pieces that make up the lense can be taken out of the lens and re-arranged. My problem is that when I got the projector I accidentally loosened the lens and the glass pieces fell out. :( I never had a chance to test it before than....

Can anyone tell me how the pieces of glass that make up the projector lens are arranged?

The lense is focused by physically rotating it. There is no focus knob per se.

There is no focus knob. I believe I focus it by twisting the lens. The lense is the issue.

I bought a Bell & Howell Super 8 projector model 346A off of eBay. I'm having trouble focusing the picture though. I think it has something to do with the way the 4 little glass lenses that make up the lense are arranged. If anyone knows how thease pieces of glass are supposed to go I could use ...