I disagree.
It would have been a waste of time doing it and not sharing your experience with the others here... perhaps.
I mean; in addition to learning something new and finding that it works, you have inspired others, @stewblack for one, to have a go where otherwise they'd have been overawed by the prospect.
That lickle cab might find a new home in a home cinema system. All you need is a mono amplifier module of suitable spec to make it an active sub. At those levels you might never get to fart inducing cone velocities and you'd have a really solid bottom end as a result.
Not a waste of time.
Well done!