thanks for the help, too bad i can't do much with the Hitron gateway, but atleast it looks....alright?
gonna save up some money for a different router to bridge to.
The CGN3 supports two bands and the 5G band isn't compatible with Chromecast setup. If you disable the 5G band during setup (you can re-enable it afterwards) your problems may go away.Log into your router ( enter 192.168.0.1 into your browser's address bar, the default username is "cusadmin" and password is "password")
At the top of the screen, select Wireless
A third of the way down the screen, select the 5G tab
In the right-hand column, set the Enable/Disable switch to Disable
At the bottom of the screen click on the Save Changes button
Try ChromeCast setup again
After done (successful or not) reset the Enable/Disable switch and click Save Changes again