Been hearing and thinking about the motor guard after the wholehouse DIY unit grenaded on me. I liked the idea of 1/2" to hope for a little more volume. Went the way Zoama did.
Bought the M100 (1/2" and three filters) off amazon $69. Picked up adapter/reducers at home depot (lowes has them too). Now I just need a project to test it on. Won't be long I am sure.