So its probably a stupid question and a over asked question but here it is. If crafted by a force sensitive can a non force sensitive use a light saber?

as far as I can say you can properly use it in Darkness only with non-projectile weapons skill 5, so I been told by few FS people, but never heard it confirmed from admins.

A non-Force Sensitive person can own, equip, and use a lightsaber, yes.

Can they use it accurately? Probably not. Wait for combat rules.

As Hal said, since its a weapon and combat rules have not been drafted or finalised, its useless musing about it. Its been mentioned that a non-FS will require a NPW skill of 5 to not harm themselves, and would be equivalent to the Lightsaber duelling skill at 1.