Fred,
I've used many PST's and many cameras, but to be honest I've never tried a OSC camera on solar Ha, so can't say what NR issues you may have.
My experience however, would lead me to agree that the Bayer matrix would suppress the NR at the cost of definition.
My experiences so far with the use of flat on full disk solar images, using the ASI 1600 is proving successful.
See my thread:
http://www.iceinspace.com.au/forum/s...89#post1517989