I've never seen it tried before, but any thoughts about running bikes only, all the way through practice and both motos, then an intermission, disk up the track a little, and have a pre-arranged start time for quad practice and then their motos? Quad riders seem to be a lot less concerned about what bikes do to the track than bike riders are concerned about quad wear on it. Im not sure how it would affect spectator turnout, but I would think riders of both would prefer it as they would be in and out in half the time. It not unsual at all for me to scramble to be at a track to run practice at 8:00am, and then sit around until noon for my first moto. I guess for guys that run multiple classes it might be harder, but the idea of coming at noon and leaving at 6:00pm instead of coming at 7 and leaving at 6:00pm sounds pretty good.