Hi again!
You don't want to put more than one hexagram above a door, because they are like bar codes and if you have two the Universe doesn't know which one to read. I would put the Diamond Cure over the door to offset the Disaster Star (pages 23 and 24 of the Level Three Manual).
If you wan to use the Illness Star Hexagram as well, it should be at least a yard away from the other one. Remember, though, that your 20 years stars chart will have a general cure that might be sufficient in and of itself. This is why it's so great to hone your muscle testing or dowsing skills. You can then tell the relative merits and/or energetic shifts of using one or the other.
I also came across a comment in my Diamond Hexagram class notes that Marie definitely prefers to have hexagrams be visible rather than tucked behind other graphics or objects.
All the best!
Wendy Greer
