I sailed a masters event a few years back with one sailor a severe Diabetic. His Laser came with, and my memory lapses, either a unit that reported to shore that he had stopped moving and required rescue, or a unit that reported blood sugar to shore.
Seemed to me to be a great idea to allow all...
If you get really, really, really desperate I have one in my box of bits which is of little use to me
But I'd think about updating and replacing with a screw type fitting
Steve & Alex
Indented Head - Victoria - Australia
Re Q 2
Suspect that prior to start there is no proper course so you can luff to head to wind, but after start you cannot luff above proper course (which may be moot as to what is) Rule 17
Re Q 3
The zone does not apply as not approaching windward mark and if at starting mark rather think that...
At our club we use a program called "Sail 100", but there are others. It adjusts individual H/C's each race over a season/
I inherited it from whoever found it first and it is designed to allow for mixed racing or for different standards.
It is a lot of work but satisfying for me when I can...