Thanks all...I did read all the site stuff which was great! However...is there any reason not to do the far cheaper (flip) method with a second set of top clamps and longer high tensile bolts rather than the purpose made units as described above? (Only reason is that, rather than spend the money and find them not quite right, maybe try out the elcheapo method?)
I assume you could get those clamps anywhere...(we have no wreckers in our area)
Chris