"I normally play in CGCGCD"

Is that 'C Modal' Ralphie? I've occasionally used CGCGCE and it sounds very deep and wonderful (think 'Caledonia'). Unfortunately, due to my advancing years and the accompanying loss of brain-cell-elasticity, I find it difficult to remember 'shapes' in multiple tunings nowadays, so I stick to Standard, Drop-D and DADGAD.