Sirui G-10KX  type_Batteries Original Leitz brochure for the

Original Leitz brochure for the Leica CL

that's the biggest issue

nothing more nefarious

It's got built-in Arca-style rails for tripod mounting and a battery door cutout so you can change the battery and SD card without removing the grip

The Olympus MCON-P02 is a close-up diopter that attaches to select Zuiko DIgital lenses- and potentially others with 46mm or 37mm filter threads

Sirui G-10KX &nbsptype_Batteries Original Leitz brochure for theThe Sirui G 10KX is a compact ball head rated to hold about 17kg, though Sirui tends to list maximum possible load, not "safety load", so maybe go easy if you're pushing the boundaries: this is a little head (it's about 8cm tall). It would work great for a travel tripod or monopod. Uses standard Arca style plates (sold separately)