I`m unsure about Winchester,but he`s a young lad & only played in a handful of games so will only get better.As for Paul Black,he`s clearly not up to the standard required and needs replacing at the end of this season,harsh but fair I think.IMO Diamond & Clarke are capable L1 centre halves but neither of them are commanding with an air of assurance,say for example the way Gregan was.Reallistically though given our budget we`re unlikely to get someone in much better.I`d be looking at the likes of Michalik at Carlisle at the end of this season,who is one of several of their players out of contract.