Cool! Other than I like it a lot, my only observation is that the bottom one seems lighter than the others but might just be how it's showing up on here.
How do you recover your negatives? From what I've read it seems to involve - a mess!! I think you posted before about your process but I can't remember offhand.
The bottom one did indeed get a bit more washed out than the others. It's never quite predictable what these negatives will do, which is kinda why I love them
It's a little messy but not complicated. After peeling the print off, let the back dry. Cut off the extra paper so you're just left with the negative (same size as the print). Put on some latex gloves (I use the ones that come with my hair dye) and place the negatie emulsion down on a piece of wet glass. Some say to tape it but I never bother because if the glass is wet, it sticks pretty solidly to the glass and nothing gets under it. So now you are looking at the black stuff on the back of the negative. This gets washed off with bleach. I use gel bleach and gently rub it in circles with my fingers - just a few passes over the back. Wash it off.
This should all be done over the sink, since the black stuff is goopy, it spills, and it (and the bleach) can stain things. I also keep the water running because it doesn't really take very long at all. Wash off the goop. If there's still a few spots of the black backing on just use a dab more of the bleach and rub gently. Wash it completely, and then take the negative off of the glass and wash off the green goop on the other side. That's the stuff that transfers the dye from the negative to the print. Hang and dry like you would any other negative. Then they can be scanned. They're a size bigger than medium-format but smaller than 4x5, so it's still a huge negative.
I've been thinking lately that the color shift might be more drastic if you wait a few days after shooting to get the negative. I haven't been doing mine the same day and I think it might affect the color. I've got about 10 negatives that I need to wash that I took a few weeks ago. The next pack I shoot, I'll try to recover the negatives the same day to see if there is any difference.
So far my experience has been that the negatives are more washed out than the prints, so if you have a print that is either over-exposed or even correctly-exposed, the negative is going to seem very light. If you intend to shoot specifically for the negative, it's better to underexpose the print and then the negative will seem like it's correctly-exposed.
Oh, and I don't know that this works on the original Polaroid emulsions. I've got a few precious packs of it that I haven't shot yet, but otherwise, everything that goes through the Land Camera is Fujifilm. Also, this process is only good for the color emulsions. The black and white works very differently and you can still use the negatives, but they have to be scanned as-is as positive images and then reversed digitally in post.