Soldato
If you watch the video, the kit comes with what looks like ~50ml of fluid to top up the loop with... I wouldn't want to risk dropping the cold plate and having the whole loop empty!
At least I would then be able to flush it out properly and ensure any remnants of crud from that previous gasket is out from the fins etc. ......But point taken, out it all will come
Knowing my luck what you describe would happen..!