@Sunshine about 10metres and 1 thick outside wall. I made the X50 the main router as it's the strongest of them all. is it maybe better fo turn on the internet from my main router I received from my...

So I have the next configuration: My main router is my X50 in my garden. The 3 other ones are on all my floors of my house pretty much above each other. Distance from the garden to my house is about...