While I completely understand the frustration with tracking down and dealing with RF..(been there myself)...I also realize there are hundreds of users that install these setups every year without any type of RF problem at all...

Good stories are rarely published..
Bad stories always are....

RF is not a depth finder issue...never has been, never will be...(we must note here thar crosstalk interference is not RF and is a topic for another day)..

RF is generated in the our boat somewhere ...and today's electronics are sensitive enough to pick it up...

Every boat setup is different...requiring different solutions for each in it's own merit...

The only way to guarantee no RF showing up in our expensive electronics toys is to buy cheaper less sensitive electronics ...(and I doubt any of us would want to "not have the latest greatest")...

Rickie