I went to build the latest version of exim from Nigel Metheringham's SPRMS today and did a quick check on the differences between his .spec file and my own customised one.
I was happily surprised to see that he'd folded in my changes into his! So there you have it. I am famous. ;-)
(Though I've found another necessary change to get it to build, but that's another matter).
This is why free software is good. We all get to share our knowledge around (like academics) and thus make the world a better place for everyone.