Can anyone shed light on this different, at least to me, faceplate on this x150.5. I own a late production model with the round cutout and have never seen this more current faceplate on an X150.5.
I do not. I saw this unit for sale and was surprised to see the different faceplate. I thought my unit serial #D-3624 was from final production yet this appears to be the current faceplate style of the larger .5 series.
There have been a few examples of in-house pieces escaping into the wild, but only Kente@passlabs.com would potentially have info if you have a serial number. Most recipients of such items have had the good taste not to sell them.