you will need to get rulers that are 1/4" thick. Check out Handiquilter's site, they have several that would probably work for you. There are lots of videos on Youtube showing folks doing ruler work. Patsy Thompson does ruler work on her sit down long arm--she has an APQS George, you could check out her Youtube videos. There may also be some on the Handiquilter site explaining how to use rulers in quilting.
Rob