I, too, have the Sparrow 30. I just returned from a retreat where I used her for four solid days. I got mine through Overstock.com, but it actually came from Sew Vac Direct, a vender I've used many times for years! I bought a quarter inch foot from Sew Vac Direct. It is a Brother brand described as 1/4" Piecing Foot with Guide, SA185. It gave me a consistent scant 1/4" and I am very pleased. At the retreat, I used my Sew-Ezi table with an insert for the Sparrow. I'm a very happy camper!