Alfredo Morelos on the eve of the new season - because he's still not convinced his former club can trust their striker's discipline.The Ibrox legend believes Steven Gerrard will face a massive quandary if French outfit Lille meet the Rangers board's asking price for the Colombian.McCoist reckons Morelos will score between 25 and 30 goals this term if he stays - but only if he avoids the red cards that have plagued his career in Scotland.And he's not convinced the striker has proved that he has