indamiddle....Unless you have an immediate physical condition which necessitates a doctor then you should always call your CSM and let him/her know of your intentions...
You should then call ops or global lifeline depending on your condition if you are unable to work....
Whether or not your vote is decisive should have no bearing on your vote.If you don't feel as though you should accept a reduced slip then don't.Whatever ops do with you after that is variable so there is no point in trying to think of that angle...anything is possible.
The main issue is whether or not you are fit enough and believe that a reduced slip is warranted...