Hi all

I've just purchased 2 M4 units, and currently have a set of 3 E4 (main and 2 satellites). I haven't yet unboxed the M4s, but want to replace the E4 main with one of the M4s to get the faster speeds since a broadband upgrade to 350mbps. I am using, and want to continue using AP mode. 

My first thought was to add one of the M4s to the system and then select it as the main. But there are quite a few reports on here of that approach not working? Can anyone suggest the best way to get it up and running quickly and easily? I would rather not delete the network and start again from scratch if I don't have to, so is it possible to simply remove the current main E4 from the system, set the M4 as the main, and then add the others as satellites?

Any advice appreciated.

Thanks!