Have a under performing Quad 3100 ACT. This is my 1st season with this stove and it has under performed and i have tried everything. Everything has been discussed in a prior thread and its still not performing well at all. Only getting 5.5 to 6hr burn times on a load and the stove doesnt maintain its higher temp for long. Have 2 friends that run quads and they are outstanding performers. I came across a thread from 2012 that talks about quadrifires using there own specific fire brick. I did install new fire brick made by vogelzang that was the same size 9x4.5x1.25 that the manual calls for. Does anyone know if quadrifires use a special fire brick in them or should I be using a denser or harder fire brick.