"I hope to tie up a deal for a wideman soon. Cotterill is desperate to come back and Martin has made it clear that he feels the same," said Blackwell.
"Martin only played a bit under me last season but both enjoyed the football and the atmosphere around the place. There's a possibility that we could get both, there's a need to change games and strength in-depth is massive for this division. We've got options."
On his current crop of players he said: "I've had a chat with the Chairman and we've not got to get rid of anyone. Nothing has come out of the transfer budget with the two signings we have made so far but clearly I'd like to look at reducing the squad a little because it is quite big. The oogd thing is that people will go when we want them to go."