OK, this is a modification where you put a CPS2000MK.2 pressure chamber in place of a Monster X's pressure chamber. It only works with CPS 2000 MK.2s, as the MK.1's pressure chamber looks far too large to fit inside. OK, you have to open each gun up, take the pressure tank out of each, then fit the CPS2000 PC inside the Monster X. Then put it all back together. It's a good idea to saw the end off one of the 6 nozzles(saw the nozzle you use least), as this will allow you to unleash a huge stream of water. This modification basically make a multi nozzled CPS2000MK.2, a rather useful weapon I think. Hope this helps..
Not to mention adding the power of a CPS 2000 to the intimidating styling of the Monster X. Plus, I like the feel of the MX better... How many pumps does it take, Nick?