At the moment, this thing contains two accessories for the Yongnuo YN-560 IV:
1) Battery dummy, which enables the usage of a power supply (4x plug, 2x cap, 1x dummy).
2) Hot shoe, as an attachment to all kinds of mounts (various mounts are included as well).
Every part is printable w/o support.
Important notes to 1): Be aware of high peaks in the current drain (up to 10 A at 6 V) when charging the high voltage capacitors of the flashlight immediately after powering and flashing respectively. You might want to limit the current somehow in order not to overstrain the power supply when using the battery dummy. Furthermore, you will probably need to create a recess and a hole in the battery door for wiring, since you want to use a reasonable cable diameter. I suggest printing both caps with at least 50% infill. You may want to scale the height of caps and plugs (fold = 2 mm), and the dummy (height = 42 mm) dependent on the actual size of the battery contact (e.g. bolt, screw) you are using in order to achieve an overall height of about 48 to 50 mm.