Just an FYI the Fairwind lll is the only fiberglass hull - all the previous versions were ABS molded hulls to my knowledge. Using thread lock on a servo set screw is really not necessary on a sailboat. There is not enough vibration on board to require it. Plus those screws don't really come loose. I guess anything is possible so maybe it's an Ok idea??
You mentioned "Maybe I'll be sailing my boat this week! Tuesday's forecast is for N winds at 20-25 knots." I would give serious consideration to not attempting to sail a 36" Fairwind in those conditions.
Check out the charts below - 20 knots =23.0156 mph - That is a lot for a little boat!