After fitting my system and enjoying for weeks, i have now started to hear weird sounds/ feed back/ induced noise from all electionic systems in car.

eg. clicking through front splits while indicating?, slight click when moving T-bar shifter?,, this is really crapting me?..

I'm thinking bad earth?, or i should move my cables way way out of the way of any other loom. eg. down the middle of the car?

this is my first build, and any help would be nice

if everything is affecting it, and its only recently presenting, then yes, probably bad earth. Your earth may be corroding. Take it off and have a look.

List every modification you've made to power wiring in your car (including running new power/grounds, including battery, alternator, etc)

Thanks for the help guys