Re Oofan memory foils
I'm pretty sure that the foil memories are natural. In http://www.schlockmercenary.com/2015-05-13
Commodore Karl Tagon said "Through a quirk of Oafan biology their memories are inscribed in scrolls of foil made from their skin."
It's pretty clear that the foils contain the Oafan memories stored as patterns on the foil. Therefore, memories consume area on the inside of the Oafan.
This correlates with the idea that older Oofans are bigger, since the area of the inside of the balloon capable of holding memories grows at the square of their radius.
That means that assuming that they accumulate memories linearly with time, their radius would grow at SQRT(time) -- they grow fast when they're young, but as they get older they grow more slowly... as you go from time 1 to time 2, they grow by 1.4, from time 24 to 25 they grow by only 0.09, and that gets slower and slower.
In general, a person who is twice as big (by radius) is four times as old...
The other thing that comes from this is, without injury resulting in loss of skin, an Oofan can't forget anything. Assuming that they're using some sort of diffuse redundant write error correction (equivalent to RAID 5 or 10) even minor skin injuries don't result in memory loss.
Additionally, this implies that if the foil graft is imperfect, with diffuse write and error correction, the graftee still gets the full, correct memories. You'll need substantial damage to the foil, or only transplant fragments of foil instead of the entire foil or large intact pieces of it.
That seems to be consistent with the statement here http://www.schlockmercenary.com/2014-11-28
"I have three sets of memories ... the third is fragments of a 50 thousand year life that ended around eleven million years ago."
Meld-Minister Miamumla isn't as huge as the librarian appears to be. Apparently, in their early experiments with foil transplants, they had not yet perfected a method of inflating the recipient to accept the full foil memories of the donor, so Miamumla ended up with "fragments." On the other hand, the librarian seems to be of substantially
larger radius than Miamumla, and so there's every reason to believe that the clone will have the full memories of the librarian.