Thanks! Very helpful. I have 2 of the G450H routers and was wondering the same thing. I'll give it a shot and see what happens. I've heard that raising that too high can caues extra heat in the router? Is the firmware or router smart enough to prevent this by limiting the upper limit? (perhaps the limit you mentioned)
On a similar note, there are 3 beautiful antennas on the top but the big question is how to point them? My router is on the first floor and at one end of the house - I want the signal to go upstairs as well as across the first floor.