Jiminsav wrote:and what pray tell is wrong with the horizontal tanks that you can't get one to work?
My thought exactly. A tank which is too small won't work well at high flow rates (to much chilling of the propane), but other than that, the size and orientation of the tank doesn't matter. Unless the horizontal tank has a defect (internal blockage?), changing to a different style won't fix anything.
Having said that, a 20-lb "barbecue" tank sitting beside the trailer is a great test propane source - if the problems go away, you know the problem is with the original tank. If not... you don't need a bracket for a 20-lb tank!