I got the below reply and nothing since. I can't believe they need an engineering team to work out if gapless works via NAS. Also nice of them to give the final patronising explanation of gapless as if I don't know what it is. The spelling mistakes also aren't very professional.
"We can confirm that our products have supported gapless playback thorughout the years, however, in order to give you the most accurate answer we can give, we need to clarify the information with our engineering team. For instace, your primary source of music reprodution comes from a NAS Drive. Do you use any UPnP server? He need to establish if gapless is supported in these circumstances.
It is important to point out that the absence of gapless playback is only a source of annoyance to listeners of music where tracks are meant to segue into each other, such as some classical music (opera in particular), progressive rock, concept albums (The Wall, The Lamb Lies Down On Broadway), electronic music, and live recordings with audience noise between tracks.
As soon as our engineering team comes back to us, we will contact you immediately. "