Sigma's Merrill and RawTherapee

Hi. I’ve searched in the old forum and i’ve read that the old faveon’s camera are supported by RT (not Merrill and Quattro).
Does anyone are working on Merrill’s support? I’ve a sigma dp2m. Can I help?

Current scoop:

Some Merrills are already in camconst.json (SD1 Merrill, DP1, DP2, DP3) but the support is not complete.

For the moment the best is to first convert to DNG with Kalpanika https://github.com/kalpanika/x3f/releases