jco5055 said:
Thanks! Off the top of your head do you know what options change this? Would a roasted neck do it (only reason why I can think of since that's the only non-standard choice I make in the builder)?
Are you talking about the Neck not allowing the option, or the Body?
In most cases the body has to be rear-routed. A top routed Strat with SSS pickups can't be shifted down. A tele body can get a 24 fret repo if the neck pickup is a Tele etc...
There is nothing in the builder that looks at your neck choices and then would disallow a selection on a body. If the Neck isn't allowing an extension, it probably has to do with the construction you selected. It has to be Modern construction.