I have a BE800 router but was thinking of replacing it with a 3 pack of DECO be65 mesh network. 

If I was to keep my BE800 and put it in access point mode, would it work with the BE65 deco mesh? 

Im a mesh noob and thought about selling my BE800 to get a proper wifi 7 mesh network as I thought the BE800 only had easy mesh mode and wouldn't work with the deco one mesh be65 mesh? 

Would the be800 be redundant? 

Thanks