interesting mast step option

[benz]

Discovering after weeks of searching that no mill or distributor will sell me less than 1000 lbs of the tubing I want for a gaff mast in the length I need, I found a light pole company whose pole is exactly what I want (same thing, different Google search. If only I had known!) It comes welded firmly to a base designed to be bolted to a concrete footer. I was going to simply cut off said base, when it occurred to me that I could perhaps just stand the base on deck and bolt it to the partners, with a suitable compression post beneath. It seems unconventional, which makes me ask: does this raise all sorts of red flags among you riggers? I'd love to hear any pros and cons.
Thanks,
Ben