Armando Dobra spent four years at Chesterfield but is now on his way to League One [Getty Images]Leyton Orient have signed attacking midfielder Armando Dobra from League Two side Chesterfield for an undisclosed fee.The 25-year-old has agreed a three-year contract with the O's, having scored 39 goals in 165 appearances during a four-year spell with the Spireites."I'm ready for the step-up, and here is the perfect place to do it," Dobra told the Orient website.Richie Wellens, the O's head coach, s