I made a tutorial, but it only recorded in 1280x720, but it still makes sense, almost . .
Edit . .
I recorded it, again, in full resolution, with a full explanation . . Here it is . . .
Cool! You might want to record with a capture of the whole editor window and/or make the play window smaller so you can see better on the recording. Good stuff, though.
I lowered resolution to 1280x720 because it was lagging, I thought lowering that would increase the frame-rate . . It squished the video, instead . .
Re-recorded it, with better resolution . . Think you can create almost any controller, if you learn what's in this video, maybe . .