Hey I'm new to the site but wanted to post! I just installed an aviom in a 10yr old building and boy was I happy that someone had already run and left me 3 empty conduit with pull string.
Myself and one other person did an eight line pull (4 on each side of the stage) and a 150' run to and from the booth in 30 min. flat. That Rocked!!!!! I would just leave extra pipe with pull lines. Whomever comes behind you will LOVE U! Besides you never know what is really coming in the future right...or do you???