I am just concerned that 450 cfm is too small.
Didn't someone figure that 125 times the square foot of the hood opening was a minimum of some sort? Brains stop functing after a certain age I think.
It looks good either way and it reminds me of the amount of work involved in getting mine to that stage.
And for the folks reading this that are just getting their own system set up remember:
"Gloves of some kind is just a requirement like clothes of some kind anytime you work with sheet metal. Its all just a razor blade in disguise looking for flesh to consume."