I notice that your D-370 has a red tint to the pictures to. I just recently did a D-380 and the color change was was not near as noticable. BUt Sunday night I IR modified a friends D-370 and it had that same red tint. I am glad to see that it is in the cameras themselves and not something I did.
I did notice the the IR filter in the 370 was very green and the one in the 380 had a very light pinkish tint to it. I wonder if you could come up with some green tinted glass if that would help with the red coloring on the 370's.
I no this was a little off subject but seeing the pictures , I had to mention this.
Not a bad idea ACrow...Perhaps having a IR filter on the out side of the cam that would slide away during night time would do the job...Need to come up with something like a solenoid that would be triggered with the sensor at night but not during the day.....