After seeing Spot's advice to never use shotguns on an interior shoot, I find myself searching for a boom-mountable shockmount suitable for a studio size microphone. I own a Cascade M20, which is roughly the size of a Rode NT1. I have a shockmount for the mike, but it does not hold the mike snugly enough for a boom. What is the common solution for mounting a studio mike on a boom?