IAN Holloway will have the option of starting three centre backs against Middlesbrough after doing "a lot of work" with his defenders in training this week.
Switching to a 3-5-2 formation paid dividends at Bournemouth last Saturday and Holloway will consider using the same tactic when Boro travel to The Den tomorrow.
"There's a lot of work to do with the backline to get that right," said Holloway.
"If you change from 4-3-3 to 4-2-3-1, that's easy. But if you change your defence to a three or a five, it's very complicated – it isn't easy.
"There are a lot of things that are done differently and we've managed to do them when we go behind.
"It looked quite effective at Bournemouth but, after we equalised, we looked like we were going to concede again.
"So to start a game that way, you have to be careful. The lads are learning and we've done an awful lot of work on it already this week."
Up front, Holloway says Ricardo Fuller is ready to come into the starting XI having changed the game as a second-half substitute at Dean Court.
"Last season we had a giant in Stefan Maierhofer, went back to front and hit him – it’s slightly harder now but I think Ricardo is fully fit and ready to go again," said the Lions boss.
"We're not far away from being a very good team – I think we've proved that week in, week out, but we've got to turn these draws into wins."
As Holloway weighs up his tactical options for the Boro game, he says he is thrilled with the flexibility shown by his players this season.
"I'm glad they had enough about them as a group to turn it around and get it right at Bournemouth," he added. "That's no mean feat.
"That would not have happened last year – we were losing by fours and fives and the manager lost his job.
"It's a good job we can change formation and I spent a lot of time on that during the summer, just in case, and now the lads understand it and it gets us back in games."