Quote Originally Posted by AgX View Post
Fiddling around with a saw in the dark is different from drawing film through a splicer...

And not much mechanical saws have precision guides to move the film spool along.
No "precision guides" just mark the roll, hold it in hand and saw. The margin of error is huge (millimeters) for my Horseman backs. I can do the cut by hand with the night-vision. I just cut a guitar saddle to 1/64" by hand yesterday. I'd use the same saw. I could probably do the cut in the dark by propping the saw up horizontal on a piece of appropriately sized wood.

Now the 'dust' may spoil the edge of the film, but I'm thinking of something like a 'surplus' or 'free' roll of 70mm that would be otherwise useless. Not something that cost $500