Actually what Fireflies shipped in the original ROT66 was the FB4 tint. It is greenish. The FD2 tint is much better. It is what is used in the FW3A and MF01S. It is not exactly rosy like the 219B sw45K but it is not yellow/green like the LH351D, 219C, and SST-20 FB4 tint.

I think with the new 15deg throw optic, this will throw very well and glad they got rid of the battery carrier, which relies on the cushion for compression. Overtime, the cushion loses resilience and no longer apply adequate pressure to the electrical contact resulting in high resistance and low output.