Re: Shihan smith passes away...
My sensei's sensei passed away a few years back, as well as an iaido sensei that was a friend of our dojo. Both of these events hurt, not only because we couldn't see them again, but because their knowledge was partially gone. I can partially identify with how you're feeling right now. I don't know how I will react when my sensei passes away.
I'm sorry that your teacher has passed on, but you know what your job is now, right? Start trainin' them kids, bro. Pass it on!