I'm in the early stages of planning and building a trailer mounted rig and need some input. I will be using a 250 gal. propane tank. I have a couple questions that I could sure use some help with. First I need to know the pros and cons of building it as a reverse flow or should I just go with a conventional design. Secondly I need to know what size firebox, stack demensions, air intake demensions etc. would be adequate. If anyone has a diagram of a similar setup pics would be much appreciated. Thanks in advance for all the input.