Nice link, Vic--now can you or Saltheart dumb it down for those of us who aren't fluent in calculus?
Mike T built himself an 11' SSU MH using the Fuji concept lowriders. He uses it with an Emblem Pro 5500. The action of the Arra isn't that much different. He can probably give you the guide spacing that he used. He probably also built a few 1322s with traditional BSVLG guides.