Nice job! That looks like a sweet setup and if the floor's repaired well, should give you at least a few more years!
I don't know how well aluminum conduit stacks up against the materials commonly used for whitewater frames so the only thing I'd be concerned about is making sure that the frame's strength can handle whatever water you run.
If whatever you do for a living falls through, it looks like there's a vocation for you in frames...
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse