haha, its out favorite joke around here to build a guitar if you have, for instance, an extra set of strap buttons or the like, but I say, in all seriousness, what I would consider impetus to move forward with a build is a spare neck, or body, but actually, I have many builds based around different pickups, but I do a few vintage tribute builds also , mostly Warmoth Strats/Teles with vintage replica pickups , along with some modern builds designed primarily centered on modern Dimarzio pickups, I am a huge follower of DiMarzio and have built several Warmoth instruments based completely on Dimarzios as a starting point.