....WOW, a little over $400! Thanks for posting the price Dave! And here I said I was going to run out tomorrow & get one! This is a 'payday' kind of tool as in the tool I get on pay day.... Plan 'B' is to check out the Sears light that Denny is talking about & by the way, Thank you Denny .... OR plan 'C' is to just have the local auto shop do it for me. I have an MSD retard/advance knob on my dash. What happened is the knob spun on the shaft that comes out of the unit. And in doing so the shaft also turned. So in order to set the timming I would think all that needs to be done is hook the light up & turn the shaft till the timming is correct??? Then tighten the set screw that holds the knob on??? Thanks again, Bill