I've also heard that when you are are asked to redo the medicals it takes 4 weeks to receive the request, then a week to complete and another 3 weeks to process them....so that right there is another 8 weeks of waiting. If nothing has been done with your file, and you can tell by the GCMS notes, why wait for them to ask for a redo and just do it yourself. It saves you the 8 weeks of waiting for Kingston to receive them after they request it. You know that when they call to request to get them done again you are right near the end..but is the 8 weeks of waiting for them to receive them, process them and everything worth it...plus the call for the passport and the waiting time for the visa pick up...that can take another 2-3 weeks.
I guess it's each person's own choice of how they want to do it but from reading many many things on here about all this I have seen many people redo their medicals before being promted
Oh and on a good note - my papers are almost done being filled out and now I am wiating for the hubby to get his medical and send everything up to me. Hoping to fill all the papers just after the holidays