That's the one I use also. Don's a member here on the board but I can't remember his handle.
BTW: I shopped around for a spark plug magnified reading light. Found them at a couple places for $50-60. I was just ready to order one then one day we were in Walgreens and I noticed an ear and throat inspection magnifier light for $9 so I thought what the heck might as well try it. If it didn't work to read plugs I could always throw it in the first aid kit. It actually works pretty decent to read plugs. You can see all the way down to the bottom of the insulator.
