Clive Clarke moved to Sunderland last month as part of the deal but he has been out through injury for the most part.
'I think I am about two to three weeks from getting back into full training at which point I will play some reserve games to get me back to full fitness then it will just be a case of pushing for the first team.' - Said McCartney.
'It was strange how things happened when I first signed, still being up in Sunderland for my treatment, but now I have been down here for a couple of weeks and all the lads have been top class and have looked after me.
'The manager and his staff have made me feel really welcome too and I am just delighted to be here. Now I just want to put my head down and work hard at getting into the first team.'