Ok no glass door, on top there is around 2 1/2 in. & the sides are 2 each & open in the back after a few in. Last night on the other contour box it got stuck in fast forward again but I wasn't able to record a video of it. The recording got to the end & froze until I rebooted it & from hitting buttons I got the rdk-03033 error code like weeks ago when I programmed the remote again but the cable man said I did it before the one on the main box so i got the error guess it didn't help so I got new remotes but this was a different reason why the error came up If i rec. a video I will email to cox. like in my last email.