The thread and time don't concern me, there's no time constraint on this. Check, I will press seams open. Good catch.
I think that's exactly what will happen. While EQ wasn't playing nice last night, I took the screenie and played with it in paint. It's almost right, but ... it looks like the block won't give me exactly what I was looking for though. I'd been thinking that 4 blocks joining together would make the third "tile" into a square, but it only works if I want a peek a boo hole in the middle.
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I'd sure be open to suggestions if anyone can suggest a way without Y seams, and a peek a boo hole,... I've heard Y seams are challenging for a newb like me.