Ok. Lets look at a non-1.000 FP infielder. On that same team, I also have 99 Jose Vidro playing 2B, who has a performance history of fielding at a .978 pct. However, on my team with 10 Ford, 08 Joss and 09 Summers, after 96 games started at 2B, he's fielding even BETTER - .981 fld. pct.
Then, on another team -again at HIlltop - he's fielding at .983 at 2B after 108 games started there.
These are just two examples, as I've had several other instances where modern fielders fielded at or better than their histories behind deadball staffs, which is why I believe that if there truly IS some sort of fielding curve in this regard, it's negligble at best. IMO, its just another thing about this game that they put out there to make it more complicated than it actually is. It's not 'rocket science' as some make it out to be or have you believe. It's about hitting and pitching which I learned a long time ago by the esteemed Mr. Boogerlips who, quiet as its kept, is really a nice guy (Shhhhh, don't tell anybody that. lol). You can have all of the greatest fielders in the world, but if your team can't hit or pitch, you're likely to be in for a long season.