Im sure one of the more informative contributers to the forums can help you alot more than I can, but here is my opinion.
You should use your new time (whether its 1min or less) to tailor a Co2/o2 table to your current level. If you have previously done a Pb of 4:03, then you should have not much trouble increasing your times (and subsequently re-writting your tables) on a regular basis.
Hope it helps. If not..........
punish me?
