So first open up your gun.
And cut down your 3k tank like this:
And glue on a cpvc coupler and stick a piece of cpvc in it.
Sorry, no picture for this next step. You need to glue on a rubber washer to make a good seal with your turret.
Then you need to rebarrel the turret however you want to do it, I personally used cpvc.
Now you need to cut down these parts.
Now glue your tank in like so and drill a hole where your tubing will feed through.
Note you need to take out the white part that rotates the turret.
Now attach a metal wire to the tank pin and feed it through your trigger opening.
And attach your pump like so. Now just coupler your big blast part and your done!
Note: With this mod you need to manually rotate the turret.
