1 Stoker, 4 WSM?

I currently run two WSM off my stoker, and it works great. I was wondering if it has the power to run 4 fans at one time. I tried calling Rock yesterday, but no one picked up. I'm considering purchasing 2 additional WSM for competing purposes and am wondering if it is worthwhile to grab a couple more fans and pit probes.

Anyone powered 3 or more devices?