I like to write a journal and I have a leather journal that I have used for almost 2 decades. I was able to get refills for it for years and would refill it 3-4 times a year. The manufacturer stopped making that size about 3 yeas ago and I don't want to change the leather cover. Trust me I have looked EVERYWHERE for refills this size, but the guy that made them originally also made his own refills from home made paper. I have found refills close, but the paper was not good for a fountain pen, and that is all I ever use.
So, what I have been doing is getting 11x14 paper and cutting it to 9 1/4 x 11 1/2 (yes, I know regular paper is almost that size, but I want it to fit in my leather binder), then fold it in half and bind it myself with waxed thread. Been quite happy with that. But it looks odd, the sheet the most inside is larger than the outside sheet when folded in half because of the extra length the outside sheet has to do to go around the first one. So I have been binding it in small sections, like 8 pages at a time and then binding all those 8 page books together. It takes me a afternoon to do it all.
I was thinking of doing the binding and then passing it on the table saw to even it all up, after all paper is wood right . The total thickness is about 1 1/2" and I have 3hp saw. My concern is that the individual pages will rip and shred, so now thinking of a sled like jig that can hold and compress the pages together to cut them. Or band saw but I think that would leave a rough edge.
I did create a small jig for the drill press, that I use to drill 1/16" holes for the sewing that worked out ok, but was/is harder to drill through than I expected making me wonder about cutting.