No, I had that pic stashed away from a few years ago when someone posted a thread saying they couldn't get the rocker lash nut loose (which is usually only torqued to about 20 ft/lbs). Anyway, it did occur to me that I own a tool that might actually work with the engine running. It is a tool similar to the old P&G Valve Gapper tool. If it didn't get thrown off the rocker, and then eat something up in the process, I think it would indeed work while the engine was running.
