i have the Eberlestock recon harness. the bino's are loose left and right so i added a velcro strap to the inside to keep them off to one side. the top does close but barely.
Marsupial gear no mag medium works for sure, that's what my dad runs on his zulu 6's. He used both the 12x and 16x. The no mag only comes in two sizes. The mag version in medium would also work. if its the 10 x 30 the marsupial small magnetic would also work.