@Dave_6523 Hello, 

RE300 does not have an Ethernet port.  For daisy chain ,do you mean wirelessly connect RE to RE? 

If you want to use multiple REs, it is recommended to connect to no more than （<=） 2 range extenders to the router &   both range extenders connects to main router. 

If you want to connect :   Router ))  ((RE1 ))  ((( RE2  * RE2 connects to RE2 by wireless 

The above topology is theoretically possible, but its hard  to promise the performance of the second RE. 

Or you could consider topology: router ))(( RE1 ---- RE2 (AP mode), RE2 should support AP mode. 

@Dave_6523 Good day,

If you need oneMesh in the house,  network topology on the photo should be fine, we'd better lower the expectation for the performance of the second the extender when RE2 connects to RE1. 

Currently RE does not support oneMesh in AP mode , plusRE300 doesn't support AP mode so please ignore the last topology in my last reply.