None of the above are 8mm film or camera experts.
Mantik is a x-ray technician. He has no training in photography or film (other than x-ray film).
Lifton was trained in physics. He has no training in photography or film.
White is just a regular guy who spends his time looking at photos and imagines all sorts of things therein. He has no training in photography or film. He has a history of misinterpreting photos. I couldn't think of a worse guy to cite as an photographic expert, unless it was Robert Groden. Lately Jack White was been finding fault with the moon landing photos of 1969.
http://mcadams.posc.mu.edu/experts.htm#JWHITE
http://www.braeunig.us/space/hoax-jw.htm
Costella has a degree in physics. He has no training in photography or film.
Here's someone (Craig Lamson) who disagrees with Costella, and has training in photography:
http://www.craiglamson.com/costella.htm
http://www.craiglamson.com/costella2.htm
That's why you'd prefer not to trade expert opinions. Because you don't have one legitimate film expert who studied the Zapruder film who declared it a forgery.
You gave me many examples of what your opinion was, none of them are proven to be anything anomalous.
You seem to be under the impression that if you declare something an anomaly with no evidence other than your opinion, we have to rebut that.
No, you need to prove it is an anomaly. Your opinion is not proof.
Hank