I have a 1/4 foot but still sometimes I find that when I square up my blocks I have to fudge a little here and there. You shouldn't have to rip if you square up....I measure all the blocks by laying them on my cutting mat then I take the smallest (maybe 1/8 short) and I square them up acording to that one. If I'm way off then I rip the one that is wayyy off then square up from there. I know not everyone squares up but I'm not "perfect" but I like my blocks to go together smoothly when I'm putting the top together. Saves me tons of ripping and time, hope that might help you!