I was going to ask the same question Nate, not that you are not correct (about length of use), but there seemed to be just a bit too much carbon in that port.It works fine. XS ported with red beard air it pulls 32” in soft wood, I’ve had 4 of them, this is first failure. I use red armor at 40:1. 4 years commercial use is pretty good with any length bar.
I use AMSOIL Saber at 40:1 and swear by the stuff. Not sure if it would be worth it, but you may want to give it a try.
Also, I gave you a love for the pictures, but wanted to give a sad face for the saw (but can't do 2).