Is the level 10 properly tuned? Is the solenoid plunger straight? Anything that slows down the reset can affect the operation, especially when it is being reactivated so quickly due to a forced high rate of fire as in many of the those full auto modes.
When swapping valves, you can keep the same on-off assembly, but the pin needs to be the emag pin. Are you using a 0.725" pin and while urethane oring, or a 0.712" pin and black quad oring? I recommend using the shorter 0.712" pin and quad oring.
Except for the Automag in front, its usually the man behind the equipment that counts.