Sometimes doing it with one man is better than two

Using a 2 x 4 and two T-shaped plywood brackets clamped together, I can slowly creep this think up and align the vent pipes together.  I am using rigid pipes, so it's a little more of a challenge to get them straight.  It was all worth it though, since it's much quieter and less loss of cfm.

A little higher.

Checkmate.

I sometimes like to work by myself when I can because with someone else on the clock, he might not be as productive as you like... which causes me to rush, thus, also causing low quality results.