First of all, in a case like there where you have founders at odds so early on, your company is basically on life support and probably dead already. You have v

First of all, in a case like there where you have founders at odds so early on, your company is basically on life support and probably dead already. You have very little to lose by digging in and waiting for your co-founder to fold. If your co-founder has done this at this point of the business where the stakes are so low, they will absolutely try to screw you out of the 3% through other nefarious means. It sucks that a single founder can tank a promising startup, but that's how it goes (unless you've already got a shotgun clause or equivalent in your shareholder agreements).