a previous setup altered with negative taper values...

<-- heading towards drain

punchout_tukey(1/0.0005/-0.007);punchout_tukey(1/0.003/-0.05);punchout_tukey(1/0.08/-0.08);punchout_tukey(1/0.3/-0.7)

<--- drain heading

blackman;punchout_tukey(1/0.7/-0.7);nuttall

welch;punchout_tukey(1/0.7/-0.7);bartlett_hann

rectangle;punchout_tukey(1/0.7/-0.7);flattop

triangle;punchout_tukey(1/0.7/-0.7);bartlett

connes;punchout_tukey(1/0.7/-0.7);hann

flattop;punchout_tukey(1/0.7/-0.7);connes

bartlett_hann;punchout_tukey(1/0.7/-0.7);connes

<--- drain pad

punchout_tukey(1/0.0004/-0.006)

(full round)

punchout_tukey(1/0.0005/-0.007);punchout_tukey(1/0.003/-0.05);punchout_tukey(1/0.08/-0.08);punchout_tukey(1/0.3/-0.7);blackman;punchout_tukey(1/0.7/-0.7);nuttall;welch;punchout_tukey(1/0.7/-0.7);bartlett_hann;rectangle;punchout_tukey(1/0.7/-0.7);flattop;triangle;punchout_tukey(1/0.7/-0.7);bartlett;connes;punchout_tukey(1/0.7/-0.7);hann;flattop;punchout_tukey(1/0.7/-0.7);connes;bartlett_hann;punchout_tukey(1/0.7/-0.7);connes;punchout_tukey(1/0.0004/-0.006)