infty = 200;
eps = 0.01;

wall = 1;

led_d = 10 + 0.5;
int_d = 19/cos(30);
barrier_h = 8;
body_l = 70 + barrier_h;

difference() {
	cylinder(r = int_d/2 + wall/cos(30), $fn = 6, h = body_l);
	translate([0, 0, wall])
	cylinder(r = int_d/2, $fn = 6, h = body_l);
	// hole for LED
	translate([0, 0, -eps])
		cylinder(r = led_d/2, h = infty);
}

// battery front end stop
translate([0, 0, barrier_h-wall])
intersection() {
	cylinder(r = int_d/2 + wall/(2*cos(30)), $fn = 6, h = wall);
	for (angle = [0:360/3:360]) rotate ([0, 0, angle])
		translate([led_d/2+wall, -infty/2, -eps])
			cube(infty);
}

// rear end clip
clip_l = 2;
clip_w = 0.8;
clip_dist = 3;

for (angle = [0:60:360]) rotate([0, 0, angle])
translate([-clip_l/2, int_d*cos(30)/2+wall, body_l - clip_dist]) {
	scale([1, 1, 3])
	rotate([0, 90, 0])
		cylinder(r = clip_w, h = clip_l, $fn = 4);
}

// lid

lid_d = int_d + 2*wall/cos(30) + 2*clip_w/cos(30);
lid_h = clip_dist + 3*wall+3*clip_w;

translate([0, int_d + 5, 0])
difference() {
	cylinder(r = lid_d/2 + wall/cos(30), $fn = 6, h = lid_h);
	difference() {
		translate([0, 0, wall])
			cylinder(r = lid_d/2, $fn = 6, h = lid_h);
		for (angle = [0:180:360]) rotate([0, 0, angle])
		translate([-clip_l/2, lid_d*cos(30)/2, clip_dist + 2*wall]) {
			scale([1, 1, 3])
			rotate([0, 90, 0])
			cylinder(r = clip_w, h = clip_l, $fn = 4);
		}
	}
}