Originally Posted by arcticbull

You can definitely hit ZRH and BOS twice because they are on different sides of the turn. You are correct that VCE is your point of turnaround, because it's your furthest point. However, hitting FRA twice on the way back is not going to happen.

In addition your ticketed point mileage on the way back is 6602 but the maximum permitted +5% (5M) is 5369.

You may have trouble with this anyways, because I'm fairly certain your two stopovers have to be on either side of your point of turnaround. That is to say, you stop once on the way over, and once more on the way back. However, I do NOT know this for a fact.