I can reach the holes, but I cant turn it enough, or even align the threads with that big bulky hose on it. I've been at it for over an hour and I'm about ready to give up on the back three... front three read dry 1:120, 3:125, 5:132

so, so far the biggest deviation is under 10%. I wish I could get at the back three, but I'm tired, and the engine is cooling to the point I wonder if I'll even get a consistent read. all the plugs looked the same, and a healthy dry reddish color at that.