So! I am aware that another 3BA conversion exists, I have spoken to the author.
My conversion didn't take the same base approach, so the resulting look will be different. You can use either bodyslides, it'll work, in fact I encourage options.

That being said, let's get to the technical informations for this one!
The main armor has been fitted with unibody. The 3BA weights have been applied to butt and thighs, while all the original physics has been kept.
I've fixed the issues I saw in the original armor to the best of my abilities: the cloth on the shoulders will glitch and warp less, but it'll still get stuck between the arms because that's just how the collision was made, and it honestly looks like the best way possible already.
The plates on the hips do not collide with the body as per original: I've tried adding the collision in the xml but they were stuck horizontally as a result. Because of this, heavier weights will experience more clipping with the plates.
Onto the less dramatic news!
I've added a second version of the armor, under my friend Sic Parvis Magna's suggestion, which features an open window on the chest and back. I honestly thought it looked like a great version, so I went ahead with it! It's called "cleavage" and for this version immersive physics were made, so the breasts will bounce but not the chestplate. I've kept it consistent along the sliders, so it should look coherent even on heavier weights.
No zaps were made this time, but the boots recieved their rightful high heel offset!
The cleavage version, both with and without cloth on the shoulders, has been added as new entries to the esp, with dedicated ground meshes and crafting/tempering recipes.

I want to add a couple notes for UBE users!
In the cleavage version of the outfit (both with and without sleeves) there's a zap named KEEP ACTIVE. If you experience clipping with the body, especially on the legs, while using that version, it means the zap isn't active. If you still encounter clipping, leave a report with a screenshot!
Also, I've had to edit the shape of the breasts for three sliders, to maintain the immersive physics. I did my best to keep it consistent, but beware that extreme body proportions will have issues.
I've also added a tiny bit more of weight to the breasts, to make the squeeze in those three sliders a bit more immersive.

The mod comes with prebuilt zero'd meshes for 3BA and is compatible with OBody!
The UBE conversion is an optional file, thus will still require the main mod!
Bodyslides built for:
- Callisto Armor
- Callisto Armor (no sleeves)
- Callisto Armor (cleavage)
- Callisto Armor (cleavage, no sleeves)
- Callisto Armor 1st
- Callisto Gloves
- Callisto Boots