infty = 300;
eps = 0.01;

wall = 1.5;
t1_diam  = 10;
t2_diam  = 12;
cyl_h = 30;

module cyl_clip(d, angle) {
	difference() {
		cylinder(r = d/2 + wall, h = cyl_h);
		translate([0, 0, -eps]) cylinder(r = d/2, h = cyl_h + 2*eps);
		intersection() {
			rotate([0, 0, 180 - angle/2])
				translate([-infty/2, 0, -infty/2]) cube(infty);
			rotate([0, 0, angle/2])
				translate([-infty/2, 0, -infty/2]) cube(infty);
		}
	}
};

intersection() {
	union() {
		rotate([-30, 0, 0])
		translate([-t1_diam/2-wall/2, 0, -cyl_h/2])
			color("blue")cyl_clip(t1_diam, 280);
		rotate([-30, 0, 180])
		translate([-t2_diam/2-wall/2, 0, -cyl_h/2])
			color("red") cyl_clip(t2_diam, 280);
	};

	translate([-infty/2, -infty/2, -7.5]) cube(infty);
	translate([-infty/2, -infty/2, 7.5-infty]) cube(infty);
};