Spinning rod on a Flyrod blank

Hi gang!

I was wondering if anybody has tried this. I'm thinking TN handle on a 8'6
or 9 ft. flyrod blank - for float'n'fly (and maybe some other ultralight
application?)
Is this a completely stupid idea? ... or if not, what
should be the weight rating of the flyrod blank?
The guides spacing is also under question - can I start with the spacing
chart for the flyrod guides, just tape some good Spinning guides and see
how it works?

Thanks,
Nikolay