Velocity adjustment
First of all, DO NOT ADJUST VELOCITY WITH YOUR REG. You could have some recoking problems. The spyder VS2 have a velocity adjuster, right behind the marker. All you have to do is take an allen tool, turn the screw CLOCKWISE to RAISE VELOCITY, COUNTER-CLOCKWISE to LOWER VELOCITY. That's it !
Now I'll explain how to set up your reg.
-> Screw in a tank, and check your gauge.
-> There's an allen screw on the reg, close to the on/off. If you turn it CLOCKWISE, the pressure go DOWN. If you turn it COUNTER-CLOCKWISE, the pressure goes UP.
->Turning up the pressure and you'll see it on the gauge, but you'll have to dry fire to see the pressure going down. So if you're trying to get the pressure lower, turn the reg screw for about 1/8, dry fire and check the gauge. Never go higher than 300psi, you will blow the gauge.
-> When you're marker is brand new, set the reg to 250-275. That will allow the reg to break-in.
-> When you're marker had fire more than 3000 shots, you can try to lower the pressure. (try 225).
Now I'll explain the trigger modes :
-> The upper button is the on/off, and eyes fonctions. Click it to open the trigger. The upper light is RED, and lower is Green. The marker is in semi-mode, but on the safety. It cannot fire.
-> Click on the "M" button, to remove the safety. Both lights are greats, you are in semi auto mode, eyes on, ready to fire.
-> If you click on the upper button, you turns of the eyes. Personnally I turn off the eyes only to get the striker back when I'm cleaning it.
-> If you Hold the "M" button for about 5 secs, it will turn in Burst mode. The upper light is off, and the lower light is orange. That means you are in 3 burst shots mode.
-> To close the trigger, you have to HOLD the upper button for 5 secs. All lights are off, the marker is safe now.
Upper light :
green : eyes are on
red : marker is on SAFETY
off : eyes are off
Lower light :
Green : semi-auto mode
Orange : 3 burst shots mode
off : marker is off.
Recharge time :
usually I recharge my marker the day BEFORE a game. A rechargable battery loose his charge with time. This way you will never be took pants off with a low battery. Charge it for 6-8 hours for a full charge. DO NOT OVER CHARGE THE BATTERY. That will kill the battery, and you will have to buy another one.
BTW don't try to use normals 9V batteries. Kingman batteries are 9.6V, so the board needs to operate with 9.6V. That means if you put a normal 9V, the board will drain more AMPS to have to same power (W = V*A, if V goes down, A have to be highter to get the same W), causing over heating board and battery. In one word, you can fry your board using a 9V, and void the Kingman warranty.
If the ASA wiggle a bit :
Open the grip, there's a screw buttom of it. Just thighten it up : it's there to fix the ASA !
Got a ball break ?
If you break a ball, you can run a squeegie and then a swab through the upper tube after removing the bolt
Just make sure you pull the swab out the front, so all the nasty gunk will come out of the front of your gun and not get pulled into the back where your striker slot is and everything. (Thanks AznInvazn

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Dunno if I forgot something, let me know if you have a question and I'll add it here.
Have a nice game !