by Brendan Bradford - Waratahs coach Michael Cheika has delivered on his promise to wield the axe on under-performers with a raft of changes ahead of this Friday’s game against the Cheetahs at Allianz Stadium. Backs Drew Mitchell and Tom Carter have been left out of the match-day 22 altogether with Lachie Turner and Peter Betham preferred on the flanks while Berrick Barnes returns from injury at inside centre and Israel Folau reverts to fullback. Ben Volavola moves back to the bench after starting in the 15 jersey last week against the Brumbies. Barnes returns after sitting out the first three matches with a knee injury and will offer another playmaking option in addition to Bernard Foley at flyhalf. Conscious of not making too many wholesale changes in key areas, Cheika has kept the halves pairing of Foley and half