The conflict with Austria was in 1866 though.
Apart from that, the 1849 event with the crown would be pretty complicated. There'd have to be n event with a random result, depending on whether he accepts the crown or not. That might also depend on what you chose as the result of the Frankfurt convention (major german solution, minor german solution, absolute monarchy, constitutional monarchy, republic etc.), and in the most extreme of all cases, you have a constitutional monarchy (DP sliders pretty liberal) including Austria and therefore also Hungary.
That'd be one empire. *drools*