I've got a co-worker that is wanting to sell his MAD Super Max choke for a Mossberg 835, with a .695 constriction, at $30. I've heard people say that they were made by Indian Creek, and for the price I'm very curious to see if it performs like an indian creek. But before I waste money on an overhyped choke, I want some advice from anyone that currently shoots, or has previously shot this choke from an 835. How do they perform with Hevi-Shot and 3.5" lead loads? Is it worth the money or should I save my money for a real Indian Creek choke?