D30 is on MD again for 4 more days, expected ship date is 12/21 I suspect the Maverick won't be here much sooner. Get the A30 from the same drop for your headphones.
If the Marverick doesn’t use the tube for headphones also then it would be a “waste” of effort. Still thinking about the D30 for the house and then look for something as an upgrade from the Fulla. I was even looking at the info on the Teac in BT, but is it an upgrade .
On a side note did some critical listening through my standby Yamaha receivers headphone jack, it’s good enough for as often as I would use headphones at home. Just one rca interconnect swap to use it.