Re: Sorry to ask again but...
You don't want to mount directly to the scanner glass with fluid
because there is the risk of it getting into the scanner.
Better to have someone cut you a piece of glass that will fit over
the scanner glass, then install a frame on this glass of the size of
your negative, and glue the frame to the glass. This eliminates the
risk of the fluid getting into the scanner, plus you can remove it to
clean away from the scanner itself.
The Aztec make of kami fluid prevents newton rings, so would this
mean you could dispense with the anti-newton glass and mount
straight to the glass scanner bed? Also, does the Epson 4990 (I
think that was the model you were all talking about) focus on the
film placed on the glass or does it need to suspended in a holder
above the glass by some amount (I think the better scanning mf
holders and the new v700 holders have height adjustment for focus
Just some thoughts