Thanks a heap.
The reason I did not post to the previous entry was that I ran a Search for Downloads . . . and the TWP search engine only seems to work sporadically. I noticed that it works best with single-word named maps but with multiple-word names it does not work most of the time. But I will cors-post this.
Read just the first clue and am trying it now. I suspected that pathway but so far have not solved it. The area that is surrounded with kill beams seems to be a red herring. There is no buttons or anything there (I no-clipped to see).
ADDENDUM: OK I finally read the 2nd clue and spent about 15 minutes trying to hit the sensor at that insane tiny tolerance. I did not end up needing the lower corner of the square portal but I was just barely within the portal and it was quite a chore.
The last part still eludes me because I simply CANNOT make that in 6 seconds. Also about 95% of the time I do not shoot the portal in the EXACT correct position to light the laser catcher. The 5% of the time that I do shoot it right on the money . . . then when I reach the door . . . it closes in my face and snips my nose off. I need 7 seconds !! Not 6 !!