A bad cut will ruin a cigar and if you cut too much head off the cigar you will decapitate the cigar. If you cut too far down the shoulder- the area of the cigar where the cap meets the body, the cigar will begin to unravel. A decent cut would be 1/16th of an inch cutting away part of the top cap that closes the cigar while leaving some of it glued to keep the filler leaves together. Find me on Facebook