Sorry, I make it a habit to delete threads that don't go anywhere. I'm still having the same issues with the barograph, but I have come to the conclusion that the single aneroid barographs or even barometers will never have amplitudes matching that of a local, professional weather station. This has been after extensive testing, repeated adjustments of linkage, adjustable axle screw, and even crude pressure testing.
So, what I have makes a nice antique and will show rising and falling trends, but will never match the accuracy of the local weather station. If I find the time, after I have taken readings over a week or so, I may try and make up a new, corrected chart for it, but I really think the single aneroid units aren't suitable for any kind of serious precision. Maybe they can be compensated for in the digital world, but not in the analog one.
I'll try not to delete future threads though.