Are you talking to yourself or me?
Cause I've never run a car tire (I did spent a day riding a bike like mine with one.) although I support the right of other to do so if they wish.
Now that I think of it, I also once stated (25-30 years ago) I'd never run panniers or a shield!
Ok result of indexing plugs , i have check plugs all were similar colour very light brown i refitted very close to my indexing of having gap on electrode facing towards the center of cylinder started her up ran nicely no noticeable difference in power seem to per more nicely at idle but that might of been placebo affect .Conclusion made me feel better but a waist of time