With all due respect, Tim, if you don't see the difference in red quality with/without a red C element, then you might consider the possibility that you don't have the color acuity in the red-yellow range that some people do.
It's a fact that genetics determines your color perception abilities, and the genes that control your ability to perceive red can occur in something like 44 different permutations, each of which will have subtle to dramatic effects on how you perceive colors, reds in particular.
Women often have superior color perception abilities in the red part of the spectrum.
This is because the gene for sensing shades of red is found on the X chromosome, and
women have two X chromosomes. Men have only one, so a man literally CAN'T have the
most sensitive type of vision in the red range. Some women have superior ability to differentiate different shades of red compared to any man, and that's just the way it is.
To me, the difference in filtered red vs. non-filtered red is anything but subtle. I'd NEVER
want to run another PJ without a red C element or other red correction.
Incidentally, my color vision is about as good as it gets for a man. I can read the last
color vision test chart in the standard series, which most men can't do.
Here is a dramatic photo showing the difference. I took this using a red gel
filter applied directly to the CRT face of a Marquee 8000. The color value of
the red gel is very close to what a red C element provides.http://gallery.avsforum.com/data/506...rhalfnhalf.jpg