I think you are misunderstanding. It's not a light leak in the sense you are thinking. there isn't some path for light to get to your chip (like a hole or gap in your telescope tube or anything).
Amplifier glow is heat being given off by some electrical component in your camera itself (usually an amplifier). That heat is EM radiation just like light, and CCDs being sensitive to it, you get a glow/gradient from the area closest to the source. A very well designed astronomical camera really shouldn't exhibit amplifier glow as it is indicative of "questionable" amplifier placement, shielding, or choice of electronic component. As noted in their documentation, it is entirely possible that it could be caused by a "fast" readout mode. I think you may be disappointed with how slow their "normal readout mode speed is though.
Fortunately, that glow should be fairly predictable, and can usually be removed through the subtraction of good bias and/or dark frames. I seem to recall this glow is one-shot (i.e. from reading) and hence removable with bias.
Let us know how you make out. You should be able to experiment with bias/dark frames and "light" frames during the day, and not have to waste precious imaging time. You might want to start by taking a bias frame, taking a dark frame, and then subtracting the bias from the dark. That should give you a good indication of where you stand.
-esy
