with the box you can bend most of it to keep the seams to a minimum. if you decide to buy one the f7 is pretty much going to cost you the same as the cfm by the time you get a filter and outerwears. I was going to get the cfm then relized it was 120 plus shipping then 35 for the filter and what ever the outerwears cost to replace the lid. just easier to get the f7 that comes with everything.