Hi guys! Big thanks for your answer… I appreciate! So, 5th can’t be totally reduced… that’s to bad, ’cause I’ve got to record chord melody (with occasionally ˝let ring˝ situation) on my lower strings… yes, adjusting the right Sympathetic knob towards minimum reduces this strong 5th above octave presence and octave overtone is now a bit stronger… I’ll explore further and hopefully manage somehow… Thanks!