Wow this is going to be a challenge! Is all the fabric used going to be suede cloth? I'm wondering about the bulk at the seams. Might want to press them open? As far as the direction of the nap is concerned, you need to lay your paper pattern or templates out and mark an arrow on each one indicating how you want the nap to run. You might want to make a practice block or two. You can actually use the nap running in different directions to your advantage. It will look like you used different shades of the same color, adding interest to the block.