By Justin Barrasso For the first time in his Impact Wrestling career, the two-time champion is working heel. SI.com’s Week in Wrestling is published every week and provides beneath-the-surface coverage of the business of pro wrestling. Eddie Edwards on becoming a heel in Impact: “It’s a completely different chance for me to express myself”It’s the truth if you believe it. And Eddie Edwards’s words and actions are bolstered by a real authenticity. Initially part of a group of babyfaces fighting off a contingent of displaced Ring of Honor stars, Edwards turned on his Impact brethren at last mont…