A trill, generally three very fast notes on repique/caixa, two or three for surdos main synth_tools/3D Printing/Panels/Radio Shaek Standoff.scad insert_depth = 12; // overkill; currently three 3.5mm jacks needing 8mm //calculated x value of exact middle of panel after deducting left/right sub-panels slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+12; slider_bottom = v_margin+12; row_2 = row_1 + vertical_space/7; cv_in_1a = [left_col, row_1, 0]; audio_out_2 = [right_col, row_5.