It's my first day tending the 13 NC myself. I am a little nervous. Not sure how much wood to put in. I have been lurking on this site for a long time but apprehensive about posting. I have searched the forums for previous posts about tips operating the 13. I have followed all the tips. So far so good but it is a learning curve. I can't believe the difference between the 12 and the 13. The difference in heat is amazing. I guess it will take time to feel confident again......