Any question answered...

The current 30.6 is unwilling to go in any further. I could hit it with a mallet.

Or, I could get the seat-tube reamed to clean it up (surface corrosion is visible, although very minor).

Or, the answer might be "30.6? They never made them in that size, it's fucked throw it in the bin"

ryan has an awesome tool for this that he used on my alan, however my alans seattube was actually pretty fucked on the inside