Even though this is not supported, I'm sure someone here will be able to do it. A lot of people use it as their main router, surely they can not live without port-forwarding? 
Also, do you have problem when connecting Mac (5 GHz) and iDevices (2.4 GHz) at the same time (slow speed)?
Also, do you have problem when connecting Mac (5 GHz) and iDevices (2.4 GHz) at the same time (slow speed)?