Hy guys

I use a mesh network at home. The main DECO and subdevices are all M4. I bought a new DEco for my garage. Si i took a Deco E4R because this one is so much cheapier and i need it only for the garage and a little bit in the nearest airay... This makes a lot of trouble.

I have six client devies in the garage. They stay fix, near the DECO E4r (3m) and will be not move.
The mistake:
Most of the devies are not connect to the nearly Deco E4R! They connect to the next M4. So the singal isn't well, because the next M4 ist outside the Garage, in my Mainhouse.

Do they not work together?

Any ideas?
optimize the network won't be help. I changed to only 2.4Ghz, becuase it should be a better connection, as 5 Ghz. (I don't need the 5 Ghz speed)

Can it help, when i pay a M4?

Thank you