Looks good to me.
I usually use the Charbroil SRG when I want grill marks.
Never have tried on my pellet grills.
Honestly, I wasn't really expecting grill marks! I'm sure the grill marks had a lot to do with the rub, which contains a lot of sugar and honey powder... This rub is very good on chicken, in my opinion. I bought it for ribs, but I didn't care for it on pork.