Scott, Ed and his two mechanics were at my place this weekend and I asked them for their opinion on this. Ed said you should just run a Hallman MBC and I let him know you already were but wanted the Hydra to control it. He reiterated that he'd just run the Hallman since the Hydra sucks at controlling boost. He said if you really want to burn the money, you could also run a standalone EBC. He mentioned a brand like AZX or something...I can't recall. But they're like $4-$500.
Anyway, I'm sure you'll still try to using a solenoid controlled by the Hydra. Adam suggested that he had heard that the newest Hydra is better for controlling boost...not sure if you can upgrade firmware or anything.