The Calgary Mosquito Society, which I'm a part of, has developed a great relationship with the folks at The People's Mosquito over in the UK, the ones who are now sorting through the recently found drawings. With a big thanks to John Lilley, Ross Sharp, and Stewart Charman, we were given a copy of a drawing that is very relevant to our project, namely the one below showing parts that were added and deleted to convert a Mosquito B.35 to a PR.35. That's really important to us as our Mosquito, s/n RS700, was the FIRST such aircraft to receive this modification!