By John Richardson He is Manchester United through and through – but Gary Neville admits there’s been nothing like riding the emotion rollercoaster of Salford City. Neville’s ambitions to turn a one time struggling non-league club into a Championship side appear to be flagging. Right now, with Salford dicing with relegation back into the non-league and having sacked six managers during their reign, the ‘Class of 92’ comprising of Neville, brother Phil, David Beckham, Ryan Giggs, Paul Scholes, Nicky Butt and Singapore businessman Peter Lim are seemingly at their wits ends. A crushing 5-1 defeat…