Wow, it this thing tight!
I had to sand down the inside just to begin to squeeze in. Several tries with the stocking trick failed, and I ended up lubing up just as they suggested. Once I'm in the ksdg2, I can then use the stocking trick to get all the way in to the tube. I can pee without difficulty, but let's see what happens with the "wakeup wood", shall we?
One thing is for certain — it doesn't slip forward AT ALL!
I am, all in all, quite pleased. $20 fixed the cb3k's weaknesses in one fell swoop!