I am at the point where I need to construct my trellis system for my small backyard (26 plant) Petit Pearl "vineyard." Two specific questions that seem to have too many potential answers that I am struggling with. 1) What type of system should I use? Information I have gleaned has me leaning toward a Single Curtain. 2) If that is indeed the case, at what height should my single wire be? 5' 6" seems to be the standard though I have also read that it should be fine as low as at 4 feet. Any thoughts from the experts would be much appreciated.