I'm going to be using bias strips for a vine. The vine is in a circle. The diameter of the circle is 22" - so it's a pretty big circle. The instructions say to cut the bias strips in 4 pieces and use the four peices to make the circle. Is there a reason why they want 4 seperate pieces for the circle, why can't I just use one big strip? It is a continuous bias strip, so I think it would curve ok, and there wouldn't be as many seams. Any ideas?