Materials needed
1. Supermaxx 3000(yellow)... duh
2. Phillips screwdriver
3. Flathead screwdriver
4. x8 (4-6 inch barrels)
5. Hot glue gun
6. Pliers
7. Hammer
The first thing you need to do is open it up, so remove the 4 screws off the pump handle and set that aside for now.
There is an orange cap that is at the butt of the gun that needs to be removed in order for the gun to be pried apart, the easiest way to remove that is to put a flathead screwdriver under one end and use the guns butt as leverage to pop it off.

Alrighty...
Now just remove the rest of the screws on the gun, be careful when taking the two halves of the gun apart because there is a metal rod that goes between the sides where the black bumpy circle is.

Now that the gun is all apart, it is time to plug the pump, this is done by removing the pump from the white tube. Look at the green end, there are 3 holes you need to fill with hot glue, on on the tip, and two on the sides.

Once your done with that replace the pump back into the white tube, and move onto the business end of the gun.
Removing the barrels looks tricky but it is quite simple. First thing you need to do is remove the orange cap that is on the front of the barrel. This is done by literally breaking it off, shove a flathead screwdriver under there and pry it off. We wont be needing that anymore so you can toss it if you want to.
The barrels all have different amounts of glue/epoxy holding them in, some will come out easily and some just seem like they are held in with magic or something. To start out, just try to pry most of them out with the pliers. If that doesn't work for all of them then you need to remove the turret from the gun.
This is done by taking out one screw, sadly the rest of the gun kinda goes with the turret when you take it out, so it makes this a bit cumbersome.

You need to grab a screwdriver and a hammer, put the turret on the front and hit the barrels out from the back. The ones that get taken out with this method seem to take away some of the orange plastic with them, not a problem.

Cut your lengths of PVC pipe, remember to make 8 of them!! I made mine 5 inches, but anywhere from 4-6 should work fine.

The next step is to attach the barrels, this is done by putting a ring of glue around the end of a PVC barrel, also put a dot on the blue plastic where the barrel will go, then you just need to slide it into place. If the orange plastic has a chunk taken out of it all you need to do is fill it up with a wall of hot glue once the barrel is attached.

That wasn't too hard, now was it. Reassemble the gun don't forget about the metal rod, the butt orange cap or the screw that holds in the turret.

The finished product, I put a rubber band around the barrels just to be sure that they don't move.
As for the ranges, which were measured with chalk drawn on sidewalk every 5 feet. (slight tailwind, level shot, stock micro suction, four pumps)
1. 85
2. 79
3. 82
4. 83
5. 86
Total average: 83 feet. I'm quite happy with it.
Questions, comments and advice will be greatly appreciated!
I take no credit for this mod, I'm sure it has been done before, I didn't make it up.
Thanks for reading!
-Axel