PLAN B analog blog

Hello there,

I have borrowed a Plan B Model 17 from a friend and I think I understand its basic function 
but I'm wondering what other uses does it have except delaying gates?  I understand the 
description on the Plan B site but without a manual I'm a little lost as to know what else to do 
with it particularly uses for the 'free' mode switch and the inverted outputs. Also is there a 
difference between the two A+B+C outputs?  I'm sorry if these are stupid questions but I'm 
new to all this.  Simon.