I need some installation ideas about building a 25' long by 2.5' High retaining wall from 24" to 30" granite Boulders. I will be using my Toro dingo with a grapple bucket to set the stones and I am compacting a 2' wide pad across the length of the wall. I will add drainage behind the wall and sink the initial course 2/3 below finish grade. Now that being said is that reasonable? And if so How do you keep the boulders in place before setting the backfill? I am not planning on using mortar mix. Dry stack at approximately 45 degrees setback. In addition I do plan on laying a 3oz fabric on the back between undisturbed earth and drainage. Any comments ideas or information would be greatly appreciated.