The Platform Nano and the Platform X (and/or M+) can function together. However, potential users should ensure they fully nderstand and appreciate the following explanation.

The Platform Nano is designed to be a stand alone, fully featured, compact control surface. It was not designed in any way, to be used with extenders of any kind.

The Platform X+ is designed specifically for use with the Platform M+. 

Additionally, should users consider pairing the Nano and M+, they should be aware that the buttons on the M+ would overlap with the Nano as they perform some of the same functions.

As a consequence, the way the Platform Nano and X+ (and M+) work together varies widely from DAW to DAW, and may not work with certain DAWs at all. 

Tests show that typically, the X+ (M+) will start on the 9th channel, leaving the Nano itself to represent channels 1-8. Occasionally, the first channel of the X+ and Nano will overlap. These two factors could be detrimental to workflow, depending on what the user expects.

Some DAWs will allow you to offset tracks / banks of control surfaces and faders, such as Reaper, while most others do not allow this specification. 

Should users seriously consider either of these two configurations (Nano+M+ or Nano+X+), they are strongly advised to seek guidance from their DAW literature, before committing to a purchase.