Anyone replaced one of these yourself? It broke this morning on my way to a certification class and ordered a new one on the way home. Not bad cost around $40~ Main concern is how much of a bitch is it to get the hose off the valve cover without removing the cover? I looked at it and it seems to be a difficult feat considering the amount of working space back there. I have the Alldata cert so I will get the whole procedure just want any pointers or things to look at.