The deadline is 11pm on Monday evening and Buckle is still hoping to bring in two more new faces before then.
He has sold Byron Harrison to Chesterfield, while Raffa De Vita, Paul Black, Jason Taylor and Adam Powell have also departed. Andy Haworth (Barrow) and Matt Gould (Bishop's Cleeve) are both out on loan.
Coming in have been Liverpool trio Lloyd Jones, Kevin Stewart and Jack Dunn and Crystal Palace's Jake Gray on loan, along with right-back Durrell Berry, who has signed a deal until the end of the season.
"I am pleased with the business we have done and the players we have moved on and I am comfortable with that," Buckle said ahead of Saturday's trip to Dagenham and Redbridge.
"Myself, John Milton (chief scout) and Rob Edwards (assistant manager) have been working tirelessly to improve the squad and I think we are getting there.
"It’s important to have good people around you and Rob and John are good people and they have been in the game a long time. They’ve been a great help to me.
"It’s hours and hours of phone calls, looking at personalities and working out whether or not they fit into what we want.
"Sometimes when a player has been at a club for quite a while they can lose hunger and desire, but we are freshening it up, we’ve brought the right players in and I’d like to add one or two more.
"We have to gel the team together, make them understand each other’s play. It’s been a huge overhaul, which is ongoing. It’s a rebuild, but I am happy with how it’s going.
"I am enjoying shaping the club how it needs to be shaped and trying to take it forwards."
Buckle is closing in on his targets, but he ruled out a move for Macclesfield Town winger Adriano Moke, but Charlton Athletic's attacking midfielder Jack Munns is training with the Robins.
"At this stage you never know when something is going to happen," Buckle said.
"I had calls about one of our players on Wednesday, but it all rests on the club in question moving one of their own players out.
"It’s important not to take your focus off the game and that’s why it’s important to have people around you to make the calls.
"We are still working to a budget, we want value for money and these things take time. We still have to focus on Dagenham and Redbridge away on Saturday."
Cheltenham travel to Victoria Road aiming to build on last weekend's 1-1 home draw with promotion chasing Luton Town.
"The table is tight, but we are in good spirits and good shape," Buckle said.
"We performed well against Luton and we need to take those performance levels into Saturday and if we do we’ll give ourselves every chance of winning the game.
"The players have to trust themselves, put on a good performance and go there to win the game. Performance levels have been good, we’ve always been in games and I have been pleased with the players’ attitudes."