This is supposed to be a part of PjotrStrog's great rugged/multipart case system. I don't like changing tips, so I wanted two TS100's in my kit - I also use a pair of squeeze-type tweezers, so I wanted a long compartment to contain it. I used the larger bottom remix to carry these as pictured.
The author remixed this model.
a dual TS100 tray, and an accessory tray with a longer single compartment for long tweezers