I am 1.80 and can easily bang my head
. But I rarely do. One gets used to watch the head. I can aldso bang my head in every bulkhead as the doors are just too low but it happened maybe three times so far.
I would not raise the bimini just for that reason. I prefer the nice and flush lines of the original bimini.
We had a raised canvas
bimini in our last boat
and I did not like it. The clears in front were becoming blind so we removed them which led to a very wet and windy Cockpit