Below are the items I used to modify the shower head.
This item is optional but it feels good to have silicon against your butt instead of stainless steel:
There are two things I dislike about this setup but am willing to live with because it's the best setup I have found so far:
1) Sensitive water pressure - you can only turn the water on a very low setting, otherwise too much water squirts out nozzle.
2) Exploding water - related to the previous point, if you leave the water directed to the small nozzle, next time when you turn on the water at normal pressure, lots of water will squirt out the small nozzle all at once and you will be in for a big surprise. You have to remember to switch the water stream back to the normal shower head every time.
I usually need several litres of water to get clean. The whole process can take anywhere from 15 min to half an hour. Sometimes you would think you are done because the water you poop out is clear, but then all of a sudden more poop comes out. It can get very discouraging. Just know that all of us who douche are in the same boat. The cloud will clear and all of a sudden no more poopy water and you are home free. The more water you can hold in your butt before pooping it out, the faster you will get clean. And eat more vegetables! They will help holding your stool together so it's a lot easier to clean!