For what it's worth I've had Alston, AFCO, Menscer modded AFCO's and Santhuff all on the same car. Last year, I "followed" Ron and Yancey when they left Santhuff - Ron with Afterworks and Yancey now owns Viscous Performance. I send my stuff to Yancey now because honestly I think I get the best service from those guys. Best I can tell, Ron and Yancey still work closely together even thought they both have their own label. I didn't feel like I got the best service from Menscer. That's just my experience. I can send Yancey a text, video, datalog etc. from the race track and he'll text me back with tuning advice while I'm at the track. No one else has approached that level of service.