So I got the imanishi - what do you find is the best for soaking? I've left it to soak for 30 minutes+ but I still feel like it's thirsty when I use it. I haven't had time to experiment (admittedly) so hoping to skip it and rely on the professional for advice.I like the imanishi 220 and if I had to go back using whetstones, instead of diamond stones, I would use this Imanishi 220 and would buy a bunch of Debado 180 for San mai.