Yes, KM4ACK is correct: Pi3B+ might be implemented in the near future. If you would like to for now, you could also try changing your 2G/2G kernel into a 3G/1G kernel by using
PiApps to install box86 and then running the
Winelink script again, though I haven't tested it yet.
The DRA board's PTT also unfortunately won't work with VARA with box86/wine at this time, though VOX should work. (I hadn't realized how many people were running DRA boards - but it seems like it's a lot of people!). I've submitted a
bug ticket to box86 to try to help DRA PTT compatibility asap, though that might take a while too.
Eric