I moved my raw water strainer about a foot lower and so far she has started fine both times we have been sailing. But - light winds and only 5 to 10 deg heel. We will see what 15 - 20 degs does.
I too have learned that boats are built to an optimum heel for optimum speed. Our Tanzer 28 sailed fastest at 15- 20, over 20 we lost a lot of speed and went "sideways" more
Have not figured out the IC24 yet.
Irwin Citation 34