volume of water to detergent.
glad to be of help; I forgot to add why the rim tape is optional. As was mentioned somewhere (either upthread or one of the other threads on HED tubeless wheels and Vittoria tires), the rim seam isn't welded, thus creating a small fissure. Rim tape helps to cover that. From what I was told, one could just use Scotch tape along the seams to resolve any leaking. I personally added more sealant and bounced the seam against the floor to get more sealant coverage, and this appeared to have done the trick.