I am by no means the authority when it comes to myog, but i am happy with my meteor bivy, so i will answer your questions to the best of my knowledge. I did not sear the edges of the fabric and have not noticed any problems. Just make sure to use sharp, preferably fabric cutting, scissors. My mother helped with the sewing but Im fairly certain she just did a normal seem. It could be because i didnt accurately mark out the design on the fabric, but i had to evenly bunch the fabric of the foot end in order for the two pieces to fit together correctly. It worked out fine though. Others may have some advice to prevent this. Any more questions feel free to ask. i will probably be away from the computer for a couple days but someone else should be able to help you out.