Hi, I'm currently using Cokin Z-Pro Series Filter Holder, and planning to buy 6-stop and 10-stop ND filters. Undecided whether to go for the Cokin Nuance ND or Nisi ND because the Nisi ones seem to be of better quality than the Cokin ones but concerned if there will be any tightness/leakage issue although both are said to be compatible? Thanks in advance.