I have two comments to add:
1) Does this deal effectively put Hardaker in the window for a year? Could a bigger club come in for him if he plays well? It would be funny if it did as Cas fans are going on like they've won the lotterry and its only a season long loan initially!
2) Where's the money in the salary cap from Sinfield, Peacock, Achurch, Leuluai etc leaving? granted a lot of younger players have got improved contracts but there should still be space for at least 2 decent signings! if Caddick and Hetherington want to enjoy another 20 years littered with Silverware they need to "show us the money"