Hi Andy, I could not see anything in the IVA manual that sets a limit on the number of lights you can have. I will be putting mine on the outer edge of the front cycle wings, my repeaters have a fantastic viewing angle so I don't think the 5 degree rule will be a problem. I will be fitting my repeaters at the top most part of the cycle wind edge.
I would not be keen on them being fitted to the rear wings as they will leave a hole when they "fall off", as I understand these things have a habit of doing
Enoch