i bought one of the sears kits, dont remember who said it, but yeah they are stupid sizes. i dont see cutting being a problem as soon as i get one of those styrocutters/heated wire cutter. i had to trim one down to fit in the drawer, and i just used a pocket knife and lighter and it was pretty easy. only thing i see being a problem is me trying to figure out how i want them layed out. thats going to take me forever.