AVS Special Member
Join Date: Feb 2004
Location: Indian River, Ontario, Canada
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I don't have 5020, but I do have an 8350 and old HC400. Both of mine are very similar lens shift wise, so I suspect the 5020 is close.
132cm of horizontal shift is the far end of the range, and possibly a little beyond, for a 120" screen. With my two, you still have a bit of vertical if the horizontal is max'd out, but not much. 45cm is only about 15% of the vertical range, so, you might just be able to do it, but I can't say with any certainty.
If you used a slightly larger screen, you'd have more breathing room. Either that, or position the screen horizontally closer to the cabinet. Just a guess, but 20cm would probably do it.