worked a long time ago for a company in heywood, saw a scaffold of theirs recently, they use a system called "van thiel" its ordinary scaffold tubes but with a connector in each end, its really quick to use, you can have all joints in same bays, standards can be in same bays i'm surprised it hasn't took off, here's a link to the site.
Van Thiel United b.v. - building on safety
Van Thiel United b.v. - building on safety