That's awesome! SX-64's are a rare beast. I remember seeing my first and only one at a user group meeting back in the 80s. We all came in with our duffel bags of C64s, 1541s, and then had to lug in our monitors or TVs. Then this one guy rolls in with his computer all in his hand and we were amazed. Of course most of us were there pirating games, but he was just running some demos and basking in the attention. That is until the guy with an Amiga 1000 came by. Those were the days...