This is something we all struggle with, one day this month i sumbled across this 1/4 inch foot. It is similar to the foot that came with my Babylock except for the bar. This foot is only .01 cents on amazon. I bought it as Brother and Babylocks feet are interchangable. I cant say enough good things about this foot. My seams are now very consistant.
I should add that the shipping was like 4.99.
http://www.amazon.com/Brother-1-4-In...0412554&sr=8-1