Irish debutants Connacht are a real danger to Harlequins' slim Heineken Cup quarter-final hopes Quins, though, should be better prepare than most for the challenge ahead. Not only have they regularly played Connacht in pre-season friendlies and met twice in Parker Pen and Amlin Cup pools but their coach, John Kingston, spent two extremely successful years coaching Old Galwegians where, among others, the current Connacht coaching team of Eric Elwood and Dan McFarland, played under him. Yes they have struggled to a certain extent on their debut in the Heineken but it's all relative. They could easily have got something from our game at the Stoop, they probably deserved to win one of their double-header matches with Gloucester and they hung on very well last week against a Toulouse side in Toulouse that were in no mood to mess about. They have a strong extremely physical pack with the likes of Mike McCarthy, John Muldoon, Ray Ofisa, Johnny O'Connor and Michael Swift and a team spirit second to none. Eric has them well organised - We were always going to be in for a tough night regardless of any qualification considerations. Harlequins make four changes up front with first-choice locks George Robson and Tomas Vallejos returning for what could be a highly combative affair. Vellejos, the Pumas, returns on rotation while Robson has been rested since picking up a nasty knock to the head two weeks ago at Northampton in the Premiership. Meanwhile, at Kingsholm in the other remaining Pool Six game, Gloucester, already eliminated from the tournament, field their strongest available team and Bryan Redpath's men are certain to throw the kitchen sink at Toulouse. Gloucester make just one change from the team that went down 20-14 at Harlequins last week, Rupert Harden coming in at tight head prop to bolster the front row.