stuff you might want to know when you start with ethercat drivers

So I am starting this topic because I am 300% sure I fucked up somewhere in the start of the installation of linuxcnc ethercat from repositories....
first advice would be to check this topic untill the last grain of information because there might be something there that will save you a lot of time trying to figure out why your project doesn't work.... 
first tip i can give after that one would be .... 
Ethercat only works when everything is neatly organized and everything is spelled correctly and all stuff is called the same
Ethercat also likes perfect order in stuff, you can not to make disorder in the way ethercat READS stuff and WRITES stuff...
look at the examples how in the XML folder the read/write is written in the start of the XML

please feel free to add more information after this