First of all thank you for being so responsive… Really appreciate that.

Yes, I am doing Wifi Tether. In fact if I use this 750s as a home router it would be installed up in my attic where the current router lives… So USB Tether would not be a practical solution anyway. Its only for a temporary connection fallback when my ISP craps out.

So other than that, this little router should be able to be used as my main router? Again simply connect the wan port or the 750 to any port on my ISP router and I should be set? I can leave DHCP on without concern? Any other settings I need to be worried about? NAT? Dont want to have double NAT. Not even sure what that is… but I hear its bad… LOL