As of now, 2 lid organizers are available for the 935. I went with the Refuge organizer as it appeared to take up less depth in the lid than the Nanuk version. The organizer comes with the requisite mounting hardware but you'll need a small head screwdriver as you have to pass through the mesh to install the screws. The organizer is recessed into the lid and allows the foam that usually sits in the lid to fit back over the organizer (although this isn't shown in any illustrations on the Hardcases website). This is with the organizer not full of stuff, but it does rob you of a small amount of internal height. Maybe a thinner piece of foam would be appropriate if you really need the space. I think that a few (taller) lenses that I would normally place upright are now safer lying down, although that's only a supposition on my part. For now the Refuge holds my spare batteries, filters, assorted cords and a lens cleaning kit. Overall, a worthwhile accessory for this case.