Hi. I've just checked mine and the shaft will be at about 6 degrees. I was always told that the shaft should be at an angle as they do not like being straight. Not sure whether the 6 degrees will cause any trouble for my shaft. I put the yokes at 90 degrees to each other as that it was the manufacturer says, but that is when they are fitted on a car so I don't know what angle the shaft would be at then. I guess my shaft will be spinning at a max of about 800 rpm..
Casp'
Ed' Just watched an interesting video on youtube, they show the speed altering with angles wrong etc, but they show that being in phase is setting the uj's up as I have, so the yokes being 90 degrees from each other, whereas your diagram clearly shows the yokes being inline, which they say is out of phase.. They also show that as long as the angles of the uj's are the same at each end, which of course mine will be on a boat setup, then any speed alteration is cancelled out.. Anyway, i'm satisfied so I'll leave mine as they are.