Glad to be of assistance in troubleshooting the problem.
You are right about the lack of information on pitot static errors. The FARs take care of it, sort of, by wording that requires minimal errors, unlike the FW which requires even the minimal errors to be put in a graph in the Flight Manual.
By the way, only the UK military uses Aircraft Allowance - everyone else works on the assumption that the manufacturer had better make a pitot static system that has such small errors that you can take the aircraft to the published Decision Height without worrying about hitting the ground.
But that could lead to a whole discussion about QFE and other things...