These are the parts I wanted the measurements of, unseul was spot on, just gives me something to go on so I can begin drawing them.
https://imgur.com/a/gEpeZwe
Those measurements. The arms are 6 and 1/4 inches long and 1 and 1/4 inches wide.
As for the battery I'm curious how he actually secured it to the ratchet knob, most of the photos I've seen are side on, or while being worn or out of focus. I'm capable of designing and printing a solution but until the strap arrives I'm just guessing.
Here are some pictures of the battery holder. Will explain after.
Picture 1:
Picture 2:
Picture 3:
Sorry about all the stuff in the way of getting a good photo. But, it's a pain getting it put back together and I have no cable ties at the moment.
The battery mount (what the two bolts are attached to) and the lined plastic going around the ratchet appears to be all one. But, I don't think it is. In Picture two, the small rectangle hole above the Ratchet looks like one of those push in clip on latches, like you would see on a laptop. Where you push a screwdriver in and it pops the latch open. I don't know what the correct term is.
That whole section, the battery mount and the enclosure going around the Ratchet is custom made.
The bit that goes around the Ratchet. The black plastic with all the lines. Is shaped like this from the side. Warning crude drawing ahead!!
IF you have any more questions you wanted some more bad answers to
Just let me know.