Yes, but it would be easier to just use a slot port calculator if you dont know what you are doing... But just as long as you have the correct port length and area, then you can basically make the port any shape. To find the port area find the area of a circle with the diameter of whatever the calculator is telling you, then figure out what size vent you would need (heightx width) to get that area. Really much easier to use a proper calculator though.i know thats what im saying if im ganna use a slot port is there any way i can use this program?