If you or someone you know is still researching the Flachs/Flax family, my great-grandmother (GGM) was a Flachs in Romania. Her name was Ruchli Flachs (aka Rachel Flachs). I don't have any info about where her father's (Itzic Flachs, a merchant) family was from, but could have originated in Germany. GGM Ruchli married Haim Heller some time between 1885-1890.
If you have interest or information, please message me.