That's awesome..
I always thought the Bayer matrix is part of the sensor, therefore not possible to remove it without damaging the chip itself.. Because each sensor (photodiode) must have it's own individual filter, which is deposited directly on the the silicon at appropriate place(s).
Actually, all my CCD chips I accumulated over time are like that.
I shall certainly consider your approach... and I am very tempted to pay you a visit when you have some free time (we are living close) to directly see and discuss the process.