Hi guys thanks for the info!
Duane I didn't get that impression it was kind of a solution proposed to me by a mentor.
Needless to say that two didn't work the solution came after working out that the servos require constant voltage to run the program I've created, the 18v were diffused by the servos and so they didn't have enough power to run them hence the twitching.
After reading on the arduino site you can put up to 12v on the board and it will run!
With this in mind I have sourced a 12v transformer that gives out a constant 1amp current (off net gear router)
This allows the current to be constant and the servos don't drain the power for all other components, I am now running 6 servos 3 LEDs and a motor all off one ad board and it's been on constant now for about 5 hours so we'll see if it burns out the board.
Anyway just thought I'd share my findings with you guys
Thanks for all your help!