Interesting....
Considering how common the use of DFS is (well, it is round here!) I'm not sure why Roku would not enable it in regions that allow it's use?
Anyway, appreciate your time and help on understanding this.
So, my short term plan is to upgrade the AP's to use U-NII-3 (channels 149-165)
OK,
Updated one of my AP's to cover channel 149+ and your spot on, they can all use that..
doing some quick bandwidth tests, looks like they can exceed 250Mbps easily... Job done!
off to update the other AP's.
Thanks for all the info etc.