Player PER vs. League PER Questions

[BasketDork]

I know this may be a silly question to experts, but I like calculating things, in both the real world, and fictitious realm. When calculating a season's league PER, as opposed to an individual player, what changes? As the statistic calls for player, team, and league-wide numbers. Is there anything you leave out? Im not interested in debating PER's accuracy or anything, just the correct method of calculating league PER. Thanks guys!

[Crow]

Does this provide all the answers? http://www.basketball-reference.com/about/per.html

[Mike G]

League PER is defined as 15.0, and player PER are adjusted to force that result.

Then in playoffs, player PER are again adjusted so that all teams/players (minutes weighted) sum to 15.0
This may seem counter-intuitive, as playoff teams would have had >15 PER in the season. Avg is still avg, though, within a given arena.

[BasketDork]

Does this provide all the answers? http://www.basketball-reference.com/about/pe?r.html

Thats the method I follow to the T..So, when calculating lgPER, player, team and league inputs are all League stats?
Examples:
Step 1: 3PM+(2/3*AST), meaning a particular player's 3pt FGM and AST
Step 2: (2-factor*(TmAST/TmFGM))*FG, meaning assists for players team, team's FGM, and individual player's FGM,

In Step 1, figuring lgPER, is that league 3ptFGM & assists then?
In Step 2, figuring lgPER, is that league assists and league field goals then?

Am I slow or something here?

[Crow]

Your understanding sounds the same as mine.

Mike's comment about playoff PER was newsworthy to me.