On Millmann's book, the excellent profiles of few model Otsu have a reflector gunsight.
I reviewed my copy of Millman's book and found only one Otsu having reflector gunsight: that at bottom of page 57, showing a Ki-44-II Otsu belonging to 3rd Chutai, 70th Sentai, August 1944.
(but, as there is nt many differecies beteween the model otsu and the hei, it's always possible to use the second one)
Actually, in game an Otsu with reflector gunsight would be virtually identical to Hei. Would make no sense even keeping a separate slot for it (Otsu Late).
I hope you'll like my work with this skinpack
Unfortunately, I notice that your skins are always "personalized" (IIRC). I make almost exclusively DGen campaign, so I need "generic" skins (although for the generic 85th Sentai skin I'm still unsure if leave or not the fine
kanji of Wakamatsu on its tail...).
At any rate, the true problem right now is that I'm stuck with the umpteenth idiosyncrasy of Asura's DGen, in the making of my Ki-44 dedicated campaign, and it's impossible to get any true help from him.