I am new here, so hi to all. I have a couple of questions I would like to ask you guys. I have used wood for over 20yrs now so I am up to speed with the do's and dont's. I purchased a used Napoleon 1900 in the summer of 2014 and this was my first winter with it. It has done great! Plenty of heat and very long burn time. I have read about some having trouble with baffles, mine does not have baffles in the top, it has firebrick. Q #1- Is the brick ok to leave in it or should I switch and put baffles in the top ? Q #2- I have heard alot about the manifold cracking in the 1900. How can you tell if the manifold cracks without taking it apart? Will there be any performance issue or would this be a EPA issue? I am not sure I understand the whole manifold setup. Any help on my questions would be greatly appreciated.