Seems like I should be able to check the rocker movement while still on the stand. (I'm not sure if it means anything but they rockers do ALL move.) In terms of clearing any "gunk" can I just keep it on the stand, essentially flood the engine, remove all the plugs, and then motor it with the starter? Figuring out a way to affix it to the workbench sounds like a lot of work (and you're right that the plugs would be angled downward as would the hole...so gravity would let the fuel flow out).