Hey mdickler1,
Welcome to the forum! I’ve never made a seasonal adjustment, nor do I have WOT power reduction as some have reported. If you stay at WOT and lean it, can you get an RPM increase? I’m thinking it’s either got to be too rich or too lean, and if so that can be adjusted away.
The one problem I had was an engine that was pretty much happy, but in the winter I would go over redline on my EGT. I customized my needle and it worked pretty good.
What airport are you based at? We fly out of C77. NW extended Chicagoland.