I'm not so sure as to what kinda wear injecting 50/50% back through the intake track would do. If you got a 100% bov, the problem would be solved(other then blowing it into your engine compartment
. I have been running water(no alc) for a few years now(almost 3), and one of my nozzles is before my 50/50 bov. I haven't had any problems that I've noticed.