I don't usually chime in on threads that appear to be trolls, but this is such a stupid idea with enough probability that it might actually be the OP's intent.
This is a stupid and dangerous idea. Class 4 lasers are no joke. Any lasers in the cockpit that haven't been engineered to be there is stupid enough, but 6.5W? Oddly enough, I'm hoping this is a troll post, because that is much preferable to this actually happening.
So, let's get this straight...introduce a hand-held laser that weighs over a pound into a small airplane cockpit. Not just any hand-held laser, but one where viewing the projected spot alone is enough to cause eye damage without protection. One where the eyepro does not protect you against direct exposure. A laser you built yourself because shipping the completed laser is illegal. Are you going to use it by yourself? Fly the airplane and control this beast at the same time? Or have someone else take a stupid risk and have four or more eyes that now have to be accounted for? Are you going to shine it through the plexi, damaging the plexi and introducing eye-melting dazzle into the cockpit? Or going to open a window and try to control a one pound metal stick in hurricane force winds?
I would talk about the risk you're introducing to everyone outside the plane, but you clearly only think about yourself, so I won't bother.