jnaus1, You may want to try a fish tape (stiff metal wire on a wind up reel)electricians use them usually can borrow one. Anyway you would push this in till it stops, push it back and forth and have someone else walk around and listen for probably a tapping sound which would be a burried vault that your valves are in. If this works you would use this fish tape to pull the controller wire back in that conduit.
Thanks for the input everybody, my throw is 17 to 22 feet, I thought this might be to short for a PGP as I read they have a spec for 22 to 52 feet. Never used rotors b4 so I was not sure you could defuse the PGP that much and still have a good spray pattern.
Finished piping both my front and backyard and now I need to decide which rotor to go with. By design I could use either the new Hunter PGJ or the Rainbird 32SA, anybody have any input???