Actually, the party splitting up and only half of them going into the Knobby White Spider encounter turns out to have been a good thing (or at least have a silver lining), because it made me re-evaluate the KWS stat block. I built the critter using the miniatures game stats as a baseline, which was easy enough, but SWSE has absolutely no guidelines for estimating custom creature or NPC challenge level. You just have to wing it.
So I wrote up the KWS and winged it, coming up with CL 5. But then this morning I compared the KWS stats to the Acklay stats in the book ... and had quite a shock. The KWS, which I put at CL 5, could easily wipe the floor with the Acklay, which the designers put at CL 10.
Aheheheheh. So perhaps the KWS as I wrote it should be, oh, CL 12. <.< >.>