Leinster have been tight-lipped over whether they have brought over reinforcements for their United Rugby Championship match against the Sharks on Saturday (7.15pm kick-off).But coach John Plumtree said on Thursday that it makes no difference.“I have no more idea than the public about what team they will field against us, but we know their game model, we know they will come up with certain tricks to get an edge on us,” said Plumtree, who in 2014 was an Ireland assistant coach under Joe Schmidt, the current Wallabies coach.“We can’t predict who they will select but just as important is that we know how they play,” the big Kiwi said.“We know how they attack, we know how they defend and what pressure points will come our way, and also where we can potentially put them under pressure.“Having said all of that, I am a big believer in focusing on ourselves. We are going to have to be much better than we were last week against Zebre.”A notable weakness in the Sharks’ performance last week was…