My general well being isn't tied to the funds I'm using, I'll be fine if it all goes to shit. That doesn't mean I want to jump in blindly without knowing about how asicminer shares work.
Thanks for your patience in answering my questions.
It is the same process you will be going through when you buy the actual shares, namely, sell them, get payment (may be using escrow), PM friedcat, once friedcat confirms, it is done.
That is why, I mentioned it may be prudent to transfer them to PT shares.
Also, I understand you did not question integrity of bitcoin - I wrote that in addition to the answer of your original question about bookkeeping of the shares, which is:
"trust and your bitcoin address"
Good luck.