VMBDALI-20 with Miboxer DT-8

Hello,
Is it possible to have VMBDALI-20 work with Miboxer setup as RGBCCT (RGB + CW + WW)(dl-5)
I see only 4 level tuple (255,255,255,255) (R,G,B,W)
any workaround possible?
Another point
When I set up Miboxer to work as RGBW (dl-4) (but I keep CW and WW led connected)
and I send 0,254,0,0
I have green + CW ??? any idea why?
(0,0,0,254 gives CW + WW)

off topic point, I have very good python programming skills
Is there somwhere to contribute to the project?

Brgds,
Fabien