Which ND filters are you all using? I am just about to order my P2 Kit and am trying to find solid/good quality filters that hopefully aren't super expensive. These filters are sold at the website I'm buying the P2 Kit from (http://www.dslrpros.com/brands/dslrpros/dslrpros-accessories/3-combo-filter-se.html), but they are $130, whereas on sites like Amazon I've seen individual ones for as low as $30. I am just unsure about the quality. Any help would be appreciated! Also was the gimbal (Zenmuse HD-3D) able to support the added weight? Thanks!