Sil, I had a chance to play with this briefly in the CP+ show in Yokohama this past weekend (along with their upcoming narrowband drop-in filter I put in
CN).
Although I played around with the drop-in filter only briefly, did you notice that it'll waste the next shot with a blank/black shot? I wasn't certain if it was me not using the drop-in filter properly but I was alternating 1 light frame with one dark frame.
Cheers.