Since everyone's been knocking the A27M for how heavy it is, I'll play devil's advocate and cite one advantage to how sturdy it is mounted on a 13' Manfrotto 004B. In this picture Soling decided to go above me and has his 4 mics clamped to the top of my A27M.
My apologies for the crappy iPhone picture but if you look closely you can see the base of the A27M at the top of the Manfrotto and the back of Solings Windtech clamp above my big ass Shure windscreens. One thing I do wish they made is an A27M coupler, so you could replace the screw top attachment with something that could make them screw together and be stackable.
Picture is from Phish Alpine Valley 2011-08-15, the other mics on the tree are JT's AKG 480's