The venerable HP410B–Later model manual

Mr. Carlson did a vid on restoration of one a while back. I’m currently in the process myself. Something I noticed was his serial # was 28xxx. Mine is 27059. His looks the same as mine i.e. there are 2 VR’s for calibration on the left hand side, one side of  the electrolytic terminates at a 10k resistor,  and many other things. Older ones had 3 VR’s on the left as the old manual shows in a calibration diagram. The only manual I can find is for older models. It’s considerably different from I think 26xxx on. Different components, different VR locations etc. I probably don’t absolutely need it but would like to get a copy of a later model manual if anyone out there has one. Thanks all