Good day. Placing the magnet in "T" position, how would the valve drive cams be? I understand that at this point they should be "without actuation" or both cams down and after another turn would coincide with the "T" but this time it would open the exhaust valve. My question is: What is the exact position of that valve (exhaust)? About to attack? Attacking 100%? Or is there a reference mark to be calibrated? Thank you!