Rotation simulator - anyone seen one?Follow

So, I'm messing around with some of the WotLK math and it struck me: Wouldn't it be awesome to have a real-time rotation/gear simulator available. Something like Vuljin's spreadsheet but with an animated, time-delineated visua bar and a RNG showing realistic approximations of output. Perhaps showing expected Energy gains along the time line as well.....

Anyone seen anything like that around? I'm not having much luck.

Just thought I'd ask. Cheers!