[Stingray]

also interesting BDR-209XJB before this I crossflashed it into S11JX. Based on your analysis could be crossflashed even to S12JX. hm.

based on bdrflash manual:
BDR-208/S08, BDR-209/S09 and BDR-211/S11 drives can all be crossflashed into each other.
BDR-212/S12 and BDR-213/S13 drives can be crossflashed within the series with the same model number
BDR-X12 and BDR-X13 drives can be crossflashed within the series with the same model number.

If you select the BDR-S11JX, the freemkv website much like the bdrflash guide lists models 8, 9, and 11 as options for cross-flashing. However, if you select the 209XJB (SAT 8601), the freemkv site suggests models 9, 11, and 12. This may well be accurate, given that this drive uses the BD11 board, unlike the standard 209 model, which uses the BD08 board.