The beer stops actually adds resistance so although the valve is wide open the pressure is reduced through the beer stop so its being filled under pressure. I always turn the valve off in the beginning until the pressure equalizes and then open the valve.
"I'll tell you what I'd do if I had a million dollars... two -chicks- kegs at the same time"
It looks like you have your CO2 vents wide open. Do you throttle them back to control CO2 breakout, or leave them wide open like that?
The beer stops actually adds resistance so although the valve is wide open the pressure is reduced through the beer stop so its being filled under pressure. I always turn the valve off in the beginning until the pressure equalizes and then open the valve.