2 's notes on repique/caixa, two or three for surdos
row_2 = row_1 + v_margin + 12; row_2 = row_1 + v_margin + 12; //knob_radius top_row = height - rail_clearance - thickness*2 - 16.5/2; // 16.5 is the "back". // Knob base.
alt
click/enter