Sweet Thanks! It's nice software once you get used to it. Will be building mine soon for the stroker. adrian just drill two holes in your box you are using now, a little less than 4 inches round each, then go to home depot and buy 4 inch pvc pipe, enough for two pieces 9.67 inches long each then stick them in the holes you put in your box and glue them or silicone. I made my box i posted the same cubic feet as yours, so it's right for your box.