As most of us know, APA league is the biggest recreational league in the US, and consists of both 8 and 9-ball leagues.
APA uses a somewhat complex handicap system they call the Equalizer System.
It uses handicapped formulas that rate players by their actual game-play performance (mostly innings/game), and wins/losses don't really factor much.
And their formula is actually pretty solid, accept for one huge variable: TABLE DIFFICULTY.
APA's standard table is supposed to be Valley 7 footers, and these are what are used at the World Championships.
Now the problem is (and it happens in my town) that many pool rooms use the much tuffer 7-foot Diamond tables for league play.
And since the APA formula only bases skill levels (mainly) on innings per game, I have come to the conclusion that an APA SL5 that plays primarily in a league that uses 7-foot Diamond tables is actually more skilled, by about a level, than a SL5 that plays on the easier 7-foot Valley tables.
So guess what happens when these two SL5's meet up at the World's and play against each other? That's right, Diamond table SL5 player plays better than the Valley table SL5 player.
Trust me, I know. My good friend- an average-ish player who is rated on a league that primarily plays on Diamonds- won it all (easily) not to long ago at World's. $15k, and frankly it wasn't even close lol.
So attention APA League Administrators, you might really want to factor table difficulty into your formula, because Diamond 7's are becoming more and more widely used in APA leagues, and they play about a skill level more difficult than Valleys in my experienced opinion.