[morzh]

I will.

Should've photographed the internal parts when extracted, but there was too much debris and too much dirt and lube on my hands so I decided I will just snap the photos of the emptied can and the caps when installed.

As to why it did not come out as one piece - in my case I"d be surprised if it did.
The sections were not coupled with each other at all, so every one I pulled with my hands woud come out separately.
The tar was only on top, about 3mm thick and it simply cracked when I was pulling on the screw, so the screw that went exactly into the middle section pulled it out having cracked the tar on top, and there was no other bond at all between the sections. The paper was not glued to the can - I took it out without having to rip anything.

One other theory was maybe I should've drilled the pilot hole with larger diameter drill bit, as the screw when it went in could've expanded the block a bit and so it did not readily come out, although when I was screwing the screw in it went without much problem. I was afraid it would not hold well if I drilled it to large.
In any case it took me 20 minute for everything including vacuuming and wiping the vice and bagging everything - compared to what it was like in the 20 it was walk in the park.