St Helens coach Mick Potter saluted his substitutes after his side came from behind to set a new Super League record of away wins at Bradford in a 44-18 triumph. England stars Maurie Fa'asavalu and James Roby and former Penrith powerhouse Tony Puletua all scored after their introduction from the bench as Saints won their 16th consecutive game on the road. The Bulls led 14-4 midway through the first-half and Potter, who made more than 100 appearances for St George in his playing career, admitted their impact had proved crucial in helping them maintain their four-point lead at the top of the table. 'We changed things around in the first-half with Maurie, James and Tony coming on and it certainly paid off,' said Potter. 'James showed how quick he is at dummy-half and he adds some real value off the bench for us. 'And Maurie and Tony were also very good. Maurie was dynamic and I wouldn't want to have him running at me. They all got a try and they definitely enjoyed that, particularly Maurie. 'I don't think the scoreline was a true reflection of how hard the game was but we more than matched the physical way Bradford play and it's another good win.' Danny Buderus has warned Leeds Rhinos title rivals they are yet to hit top-form despite hammering in-form Harlequins. The former Newcastle Knights and Australia hooker broke his try-scoring duck for Leeds as they ran in eight tries in the 48-14 win at the Stoop. But Buderus insists the reigning champions have got plenty of room for improvement as the season approaches the business end. 'It's a big win and we did a good job against Harlequins after they won at our place,' said Buderus. 'We learned a lot of lessons from that game and its good to be heading in the right direction but we know we've got to improve. 'We showed how much quality we've got in the squad with a performance like that but we've not hit our straps properly yet. We've got a lot to build on now and we've got to back it up in the next few weeks with some more big performances. 'It was good to get my first try out of the way - it wasn't a classic but I've not scored for a while so I will take it.' Huddersfield Giants coach Nathan Brown blasted his players after they slipped to a shock 13-6 defeat to Castleford Tigers. And the former St George boss admits their chances of a successful end to the season will be ruined if they do not start learning their lessons. 'We keep committing the same errors week after week and that's got to change,' said Brown. 'We've got away with them in some games but we won't do that every week - we are making poor decisions when we make line breaks. We've got to be a lot smarter than we are being at the moment. 'We only completed 60 per-cent of our sets of six and when it gets that low it's unacceptable.' 