Very nice set!
I have a suggestion for trimming the wedge without unpinning them.
https://en.m.wikipedia.org/wiki/Flyw...rial_selection
I have a couple of those saws, good for light trimming, etc. The saw blade
should be thin enough to fit between the scales, with enough room to spare for "protection". I'd put a couple layers of Teflon plumber's thread tape on each scale down by the wedge, to keep the saw from rubbing. And like Dave said: go slow. If you don't already have a saw like this, maybe take one if the razors to the store with you, just for the sake of making sure the saw will fit with a slight bit of wiggle room.
Now, I would like to make an observation/deduction. Two of the razors obviously differ in condition from the rest. Me thinks this could be the result of a couple different factors. They may have been born to different sets, and used later to fill in some blanks. Or it could be that two were used as shavers, while the other five were left alone to preserve them. Just thinking out loud.
Also: are the scales celluloid? That would be something that would worry me, with the two in lesser condition at least.
I hope this was helpful!