With the transfer window now open, the Blues have officially confirmed the signing of Luke Armstrong - and manager Paul Simpson says the striker is itching to get involved after training with the club since mid-December.
"He's a bit of a throwback in that he loves working, loves football and being involved in it," he said.
"I've noticed that since the first couple of days he's trained with us.
"He's got settled in and feels part of the group which is always difficult. He's trained really well and shown a great attitude to everything we've asked of him.
"He's fit and raring to go and all three of them of them will come into the squad and then we have to make a decision as to whether they'll start."
Armstrong joins Harrison Neal and Sean Grehan in joining United at this early stages of the January trading period.
And Simpson believes that their arrival - coupled with Monday's win over Port Vale - has given eveyone a lift.
"I think getting that victory gives everybody a huge lift," he admitted.
"We've given the lads a bit of recovery time as well after the frantic games over the Christmas and New Year period.
"Just by adding a few new faces and getting the three points, it's given everyone a lift. Training standards have been good and the players have been bright.
"I think as players, when you're not getting results - even though the new faces coming in puts your place at risk - you want to be part of a team that's winning games, or that's how I used to feel as a player," added Simpson.
"You wanted to see who was going to try and come in and help the group.
"I think the fact we've got the new faces, and even the fact everybody knows that Luke Armstrong is available now after they've seen him training for the last few weeks, I think it gives everybody a lift and brings energy to the group.
"The best way to get energy is winning games and winning that game on Monday in the manner that we won it as well felt like a really important three points to help us move forward."
Thursday also brought confirmation that Luke Plange would return to Crystal Palace following his half-season loan move to Cumbria.
And Simpson believes the forward will have benefitted from his spell at Brunton Park.
"I enjoyed working with Luke and he's a good character," he said.
"The loan, I think it's fair to say, hasn't worked out how we all wanted it - ourselves, Luke and Crystal Palace - but it's been a real good experience for him.
"It's totally different and he had a little spell with Derby in the Championship and he's now had this experience. He's played over 20 games and he's bound to take something from it.
"He understood my reasons why we've let him go back and now the challenge for Luke is to learn from what he's seen here, learn from what he did at Lincoln and Molenbeek on loan, and make sure he goes and puts all those learnings into practice and shows everyone what he's capable of."