Oh no! Really sorry to hear about your back
It’s a great point that it’s not actually clear which way the diamond should be attached on the print-at-home stuff and definitely something we’ll think about when we next update those files.
Right now you’ll need at least two codes in view for maps to be recognised (applies to both world and controllers), but I’d recommend three as a minimum for better accuracy world tracking (with the three not being in a straight line). Having more means you’re able to view the content from different angles and still have at least three codes in view, so that’s the main advantage of more than that.
You could maybe attach some tabs to the codes so you could pick them up with a grabber and avoid the need to bend down? We also find table-top content works well, even though we haven’t actually published anything publicly yet.
I enjoy showing the “bunny out of hole” one but it’s taken from some work we did on behalf of a client so not something we can share publicly. We do have an experience of ZapBot emerging from a hatch (which is the coolest part of the bunny experience IMHO) which was more of an in-house thing so I’ll see if I can dig that up get it published to a Zapcode next week. There’s also the “mind-blown” and the small table-top xylophone that appeared in the Kickstarter video that we can probably share pretty easily next week too.