I have the HB DB02
Just a basic stand for home, I have it in an Ingles bass stand. Not for really for playing-in. These Ingles stands are ubiquitous for sale used on FB marketplace like $40. They’re too light IMHO for an embodied double bass.
I just set (not attached) a segment of 1x3” trim t words the front in the lower bout arms, which are down very low. The end pin (sometimes extended or not) sits on the board, which puts the weight on the board, on the arms, and low and forward in terms of center of gravity. Better balance than if the pin is on the floor. The neck cradle adjusted to be just above the heel when pin is extended, below the headstock when pin in. Jenky? but works for me in the shed.
If I wanted a bit more stability, I could use a heavier piece of wood notched to set on the arms, maybe attach, maybe drill a hole for the end pin. If I did more playing out on the EUB, I’d do the drum hardware tripod thing, attached to the bass.
White felt was just to dampen sound.
For any who care, heel-neck feels closer to D than Eb. Upper bout is weird for thumb position. But for the price point, it works for me.