This is an old thread but here are some numbers from a 105Mc owner.
In loaded cruising mode
All components raised - 23.5
down - 33 (I think that means the drive leg down
Rudders down - 42
On my boat.
The boat will sail to windward with a board down half way - 30-35 in.
Boards up to windward = fuggedabowdit.
is no problem.
I am not so heavily loaded so draw 4-5in less.
So that means one needs 3ft to move the boat. I try to stay in 5 or more. Chicken I guess as I have not been able to see whether it goes from 5 to 3 fast enough.
If it was 3 to 2 I would not be happy at all.
Those sand banks would be easy and just fine if one was sailing down wind
only. If one was motoring up wind
I suspect dropping the stern off a wave could impact the drive leg. The drive leg will not operate well in "partial tilt" (lose steering