Karl,
It's just a new delivery system(thickened unmixed West in a caulk tube). I used West system and fiberglass fibers to seat my beams. Just make sure you use a good mold release on your beams to pop them back out or you'll have the problems Mike is referring to.
I was just thinking it would be easier than me screwing up a ratio when mixing. I also thought that covering the bottom of the beam in vinyl like the graphics guys use would be an easy way to get things to pop apart later on. Then again it might not work.
