Gavv's final form Gochizo leaked:

Wrong thread. But a quick "nice" for it, I hope we'll get pictures of the suit soon so I can make a final judgement on how i feel about it.

Ah shucks, that's what you get for posting immediately after waking up...

Tieba's Color809 has provided infos regarding Zeztz's henshin item.

Apparently the driver is strapped across the body like a fanny pack (just like the pic shown below) instead of the waist. The main henshin trinkets are bead shaped.

Who has ever worn a fanny pack that way? Fanny packs always are on the waist otherwise they're not held up by your fanny and the name loses its meaning.

Funnily enough in one of the more recent chapters of Sentai Red Isekai, the Kamen Rider expy Amen had a few extra pieces of equipment revealed. Which also included a fanny pack styled extra transformation device in addition to the Amen Bagckle that's already used. It is also just worn across the body similar to the image we see.

Though I've also heard the term sling bag circulating which probably is more accurate though.

If you Google Image Searched fanny pack, this is one of the first images to appear.

I highly doubt you will find any photos from the 90's with someone wearing it like that. Seems like a generational error.

Yeah that's a sling bag.

Word choice aside, a driver worn across the shoulder is a cool idea! I like belts as the tradition but I love seeing more variety in henshin devices too. And if they're emphasizing the letter Z motif, I bet the diagonal strap will be part of that

Makes me think of Drive's tire to be honest.