Now we get to attach the entrance chamber to the blower unit. This is a bit tricky on one's own since it is quite heavy and very awkward to hold. I built a tower of boxes and sort of wedged it into place. I added a bead of silicone caulk to the top of the chamber as per instructions and then used the V clamp to fit them together. This is a bit fiddly singlehanded but possible. I strongly recommend getting a friend to help, preferably a strong one.