I have absolutely no issues mucking around these settings. I have already made it 70/10/10.
The only question was does it come in play when you move the "Dynamic Black" out from Advance menu from its "off" setting or is it always there.
Because the moment I set "Dynamic Black" to "Middle", the pumping starts. Hence the question.
For now I have set "Dynamic Black" to "off" to avoid the annoying pumping..