Today is the first time I let my tourbillon fully wind down. It reached the 42 hour mark since yesterday.
I pick it up this morning and it is still moving.
It stops at 8.45am and I see it stops infront of me, how beautiful 
This watch is time to my computer and when it stops, my computer time is also 8.45am.
It means it has kept accurate time all the way till the last minute. Quite amazing and it sounds impossible.
My Resonance tends to deviate at the laste few hours but not this Tourbillon.
Also, in the last hour , the remontoir is already not 'working' as it is rotating smoothly and not clicking.
So, I don't think it is the constant force at work.
Very amazing indeed.
Lovesss*CL