Various Daystar Quark Chromosphere Tuner Setting Calibration on AR2638 Sunspot Group

Itching to get an idea of where specifically my Quark Chromosphere Ha filter tuner setting should be optimal, I forced myself to haul down again at the laundry area to get some quickie shots of AR2638 Sunspot Group. Based from my previous last rough tuner calibration testing, i concluded that 0 setting is almost optimal, while going to + settings will get me to off band tuning while going to (-) setting which is counterclockwise from 0 is the way to go to get optimal tuning. In light of this, I concentrated this morning to fine tune my tuner settings but I was only able to get tuner calibration settings of only from 0 to -4 (counterclockwise from 0 setting) before clouds interfered again. From the looks of it, it seems the 0 and -1 setting is a toss up for best setting for my needs but somehow I think the 0 setting is the right setting for my solar setup. What do you think??? :) Comments and critics are welcome. Thanks.