What reveal size?

Hi Fellow renovators. Got a technical query. About to order my windows an the window manufacturer ccouldn't work out why mine were all different. After explaining different stud sizes and cladding selections I found myself second guessing.

If my plaster is 10, my stud is 90, my batten is 20 and say 35 for linea boards. The metal frame is 45, I am allowing 110mm for my reveal. Does this sound right? Also can the reveal sneak slightly past the wrap or does this defeat the purpose? I was thinking if the reveal came slightly out I would push the wrap over it and attach to frame.

Any help would be appreciated

Willy


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