I'll find out soon enough. I put in the order for a Mastermind and it shipped before the weekend. We'll be on the Mark Roth pattern Tuesday (46', 25 mL) and my water heater gave up the ghost as I was heading out of town Thursday, so I'll be going in blind. In two weeks we have Badger (52', 30 mL) and I know exactly what the Nexxus did on it. Of course I can't exactly give a side by side comparison, but I keep notes on how I play the patterns each week, so I'll know how the Mastermind compares.