My husband has just spent an afternoon making my handiquilter frame. He told me cheerfully that it was just like a giant Meccanno - and he loved putting them together as a child. His patience combined with the adjustable features of this frame made it possible to get it perfectly even on an imperfect floor. (Yes the room still needs painting after the builder removed most of the dysfunctional chimney and built in robe.)
Tip: carefully double check the end pieces on the assembly pages so that you get them the right way around.