When I started on this, I was mostly thinking in triple rotations, but lowering the period requires some regrabs outside the line. I sure didn't expect that I'd end up with 7 consecutive arms though.

I gave period 7 a quick attempt but dismissed it because it got messy quickly. But I just realized that it might have worked with a 6p approach where arms don't have to swing back to the line between their repeating instructions. It's quite problematic though because as of writing this, there's 4 minutes left to submit, oops.