Due to the fact that I found the hi res flyers now we can compare LE with Pro's

Here the slings and flippers.
Pro - has red domes, lights on the slings
LE - has blue domes, lights at a guess are in the apron (with both of these able to be done to a Pro).

notice the apron location is different on the LE's exposing 2 holes - guessing pro apron mounting.