
This was a much more brutal model than I was prepared for. I don't think I've done so many sinks and unsinks since folding through Lang's Origami Insects and their Kin!
There is one fatal flaw in the diagrams: step 82. Ignore step 82. The flap this "repeat" step uses is the one used to make the back shell.
[DISCLAIMER] I'm 98% sure it's step 82. I only folded this once and wound up unfolding what I truly believe is step 82, but there is a chance I could be mistaken.
That all said, here's my ugly model.

I used a square of tissue foil about half the size I needed to. (Yes, I used green. I have no idea what possessed me to use green paper, but I did.) The tears on the tissue part of the back are the result of me not taking my time to make quality tissue foil. Having to unfold step 82 out of that flap didn't help either. I also am exhausted and lazy, so I didn't pleat the back like I should have.
I do believe I messed up folding it somewhere... I didn't have a flap to do step 100 with.
Regardless, yes, it does make a lobster. If you're having trouble in a particular spot with the diagrams, I can still help you out, Orislater.