Doing condition inspect on 912uls, I have flown it about 10 hrs since purchase. 9.5hrs on 100ll with declin, last .5hr on 91 auto fuel. Did ground run at 4800 3 min. Plugs look kinda white?? See pic. All 8 plugs look the same Found needle clip in 2nd and moved to 3rd or should I have left it in 2nd according to plug color? What is the best way to monitor air fuel mixture egt or 02 sensor?  I need to get one or the other

thanks,  Ross

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