Hi, I'm messing around with remote modulation through alterd chords.
I have an Eb minor major 7th chord, i.e Eb-Gb-Bb-D; its acting as an altered subdominant of my original key Bb. I want to resolve it to a Bb minor chord, where the major 7th of the Eb minor chord resolves chromatically to the Db mediant of my Bb minor chord. Can it do that and be satisfied?

I see roughly what you mean.... sounds like something from a Bond movie!.... if its from your own composition - fine, but I think to resolve a minor chord with an added maj 7th sounds a bit harsh.... it tends to resolve better if the major 7th - then drop a semitone to the dominant 7th (eg lik Cornonation St music).... to get to your Bb minor, I would just precede it with an F7

just my ideas!

many thanks for the feedback. I get the impression that after a few years of studying harmony, one begins to stretch the conventions and realise that music is not an exact science. When you consider tonal, serial, atonal concepts, anything begins to seem possible and justified.

If it sounds right (in context), it is right. Formal harmony and counterpoint are two of the ways we trained our ears in the first place; composition is something else.