Thanks for your reply Philip.  My issue is twofold with the plastic boxes.  For one, most of them are ugly.  I have used nicer ones in places like a gym where they will get hit, but then the second problem is it is hard to find large enough ones to house a MR86 with two antenna's like the ANT-27.  You could do three boxes, but then you have to drill holes between the boxes and get extensions for the antenna cables - not the best look or way to apply this solution.  A manufacturer like Hubbell makes large sizes, but I don't think they are all that pretty and as the size goes up, they get very expensive.  I have not found a product that is both large enough, would look good and made for this application. Does anyone know how durable these are?  There must be some specs on this.  ... View more

  I did the HA method to replace a MX400 from an RMA.  However I had to swap back and forth a couple of times as the RMA did not send me the SFP+ module and the modules are NOT hot-swap.  But it worked.  Each time the network stopped for only about 10 seconds.  The one issue we had that I had not seen mentioned anywhere is on the MS switch settings, I had the old MX mac address as the only one allowed for DHCP.  You need to add both mac addresses (old and new MX) to this setting before starting the swap in order to not cause DHCP blockage.    I did not, and to make things worse, I initiated a  MS firmware upgrade which meant that when the MS did a restart it did not get its address from the new MX and could therefore not reach the cloud to update even the DHCP mac allowed setting.  I had to physically visit every switch and give it a static - once connected to the cloud, the new allowed DHCP mac address synced and then everyone could get back into the network.  Simple mistake, bad consequences.  Just add to your list of things to check. ... View more