I check my plugs every 10,000 miles. I study them closely, if nothing wrong, I clean them, check gap, anti seize threads and dielectric grease on the tops, and run them. Today, again, I liked what I saw.
Yep, I'm running them. If it aint broke, roll with it.
103, SERT, A/N Big Sucker, Power Duals, SE255 Cam, Factory Original HD Plugs, dyno'd.
Rear plug on the left, front plug on the right in pics.
Pics are BEFORE cleaning.

 

Got a good clean burn going for yourself there. I wouldn't change a thing either.