Sync between RBR20 and satelites fail

I tried to do the factory reset, syncing one by one. Sometimes it finds one satelite, mostly not.

My house is about 2000 square feet (200 m²) over two floors, half the house is from 1890, the other half from 1970'ies. The old walls in the old part of the house kills all wifi signals, nothing comes through. But the orbi satellite positioning at the door leading in to the old part fixed that.

Distance between router and satelites... one is set in free line of sight, about 30 feet. Second is through two walls, about 35 feet, third is in second floor, through two walls and the ceiling, about 40-50 feet from the router. They are set up in a star, all satelites speaks to the router (no daisychain).

There are tons of neighbours with wifi. I used a wifi scanner to find the least noisy channel, and that's 11. Only one other network on that one, and its weak. Channel 1 has 8 networks, channel 6 about 10. Channel 9 is totally free, but seems to be a lot of issues there. No other networks reach us on the 5g channels.

I tried all of the securities, but normally used wpa2.

Have not tried the last three things u mentioned, cuz I have no idea what they do.

I did, however, try to set up only the router. No meshnetwok at all. Even then the wifi drops in and out, and the router flashes in amber. So even when there is no satelites connected or powered up, and the router is not told to locate them, it doesn't work.

I tried the setup with v48 and rolled back to v44. With and without factory reset. Doesn't make any difference.

I take any tips I can get, but I'm on the tipping point of the scale.... store is close by...