Hi I believe that the back of my suit is too tight. When I stand with my suit buttoned there are horizontal stretch marks on the upper back. The front looks great. Everything looks good except the upper back where there is pulling. I am wondering if this is fixable. There is about 3/4 inch fabric remaining inside the center back seam, so it should be possible to let out the back. Will this fix the problem? Some people seem to suggest that this is a common alteration, but others seem to say that letting out from the center seam can throw off the balance or something. So I'm confused. What would be the result of letting out the back? Basically I just want a flat back on my suit when I am standing. The other idea I had was I think shortening the collar by pushing up the seemingly excess fabric into the collar, which I gather is common. But if the pulling is caused by tightness, would this do anything at all? Thanks in advance for your ideas.