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@the-smiling-buddha
If you keep the amount by which the seatpost protrudes from the seat tube the same, as you raise the the bottom bracket and the height of the top of the seat tube you'll also increase the height of the saddle.
By this you mean you increase the height of the saddle relative to the floor and not the distance between arse and foot I take it? Now if say you raise the BB by 1cm you must decrease the seat tube cc length by 1cm to obtain the same stand-over - but then seatpost must protude by an extra 1cm to maintain the same length arse to foot...?