Aww c'mon guys... we could have had some fun with the potato thing
Good looking pic, Hyper.
Next time, regardless of the guideline time frame you are following, use a few of the tips mentioned in the other thread to check for doneness.
Once you do it a few times you'll get a feel for things. And there would be nothing wrong with finishing those in the oven if you shut things down on your kettle and just wanted to eat in thirty minutes. Assuming they were waaaay underdone, it looks like they picked up some smoke anyway.
You never mentioned your rub. Was there anything with salt in it?