Not necessarily. It can be... If the guitar is way out of wack. Things that can become difficult are intonation and floating trem setups. If you have the tools though, setups are fairly easy. just pay attention to detail at first until you learnt he ins and outs... That book is a great resource. I've read it cover to cover three or four times... and I've learned something new each time. Good luck. If you need any help on anything just let me know... feel free to PM me if needed.