when i bought this item it basically came with two halves of the yellow rubber bushes. i was told that you remove the engine mount and basically stick the polyutherane bushes either side of the original rubber mount then bolt back together. However whilst getting a service at Thorney i asked them to stick the powerflex mount on for me (aware that its an uncomplicated job but lack of tools prevents me from attempting myself) they came back and said "we cant fit this without the metal tube. So according to them there is supposed to be a metal tube supplied with the mount. So could Anyone that has personaly fitted a powerflex mount to their engine please tell me wether i need this tube or wether the mounts just sit flush around the existing rubber bush?