Well I am going to throw a spanner in the works.. I have a quarter inch foot...and used it religiously...until I realised this is why my blocks are always a fraction short... the foot is tooo exact, and everyone mentioned the scant 1/4" and by the time you lose those couple of thread widths it all adds up SOOOOOOO resorted to taping across the throat plate as a guide, it has taken me time, but I think I am getting the hang of it :D Like Patrice says, practice makes perfect...eventually :lol: