How are you venting on top? Are you doing a slider that can be adjusted? That setup is going to be so nice for you. I know we've seen them before like that, but still... Another thing to consider with the front mount, is that it makes it SO much easier to get right up to the pile with. If needed, you can tuck that front end into anywhere. Also, if you are using pvc, what kind of curve angles are you going to have? (I mean how tight). I remember some of these guys that used stove pipe, readjusted and went with a bit more gradual of curvature for less resistance. Keep us posted!