I have in the past.

I have 4 boxed with 3 pcs back in the day, its just not as accurate as he seems to.

If you watch some of his Ice Wizzy videos back in the day, they all cast at the same time. I tried replicating that, and with multi keyboarding I wasnt able to get that type of response with more than 2 toons.

Maybe I just suck hehe