Yes, true, but honestly don't know if my tires are past the point of 'fixing'. I think there might even be 'chunks' of foam in there, because the imbalance almost seems to change from moment to moment.
I will give it a try, I'm sure it can't hurt.
BTW, has anyone else used the RD Logic "porcupine" tire on their truck? I have never seen a tire with so much grip, especially on grass, it appears as if the truck is on rails when making sharp turns. Just thought I would mentin that, as I give them two thumbs up!