well frosty, ****! I really appreciate taking the time to be as incredibly thorough as you are. Ill be pursuing the propane route, a fuel air bomb is not the way to go, on a side note, I dont know if your familiar with a thermobaric bomb but it works on a similar principle as a fuel/air but emphasizes gas expansion to create a large pressure wave that no cave dwellers can hide from. Ill be busy for the next few days possibly weeks to begin to comprehend what looks like years of knowledge and wisdom compressed into half a page, thanks again all for being so patient Ill be sure to let you all know how this venture unfolds.
-Randy