pbase_tab = 12;
pbase_thick = 4;
+inner_pbase_thick = 12;
+inner_pbase_rad_mul = 3;
// computed
arch_in_rad = arch_width/2 / sin(arch_beta);
arch_to_chord = arch_in_rad * cos(arch_beta);
-inner_pbase_thick = 8;
echo(inner_pbase_thick);
-inner_pbase_rad = arch_in_rad * 2;
+inner_pbase_rad = arch_in_rad * inner_pbase_rad_mul;
end_thick = arch_thick;