Yup, i did it, it was really fun :) Working toilet (including sewer) working show (and dripping like a real shower) working sink and working light switch (its epic) I can make it full, as like making a bunch of toilits with private piston doors so no one can peep XD and all toilit crap leads to 1 sewer pipe also no redstone sticking out or anything :)

ENJOY
~PancakeMix3r

Additional Notes

To open it, Go to your minecraft saves (it might do it auto) and right click and click extract here. TADA