very basic cliff notes on tesla invader series 3-4x
If I had an extra orange invader 3,4, or 4x, it would be my pleasure to make you a proud new owner. Here is some back story from what I recall of those three in the Tesla Invader series
Invader 3 made from a lightweight alloy and only takes 18650s, its compact and best fits an atomizer that's 24 or even a 22'' (for zero overhang).
I think the invader 4 comes in orange (I would LOVE an orange one!). Its made of a *similar lightweight alloy as the Invader 3, but the 4 is considerably larger. Its bulk is directly due to the fact it can accommodate nearly any sized pair of (married) batteries.
Now the 4x is a different beast and while i don't know much about it, its design has some different traits than the previous two mods. Its also made of some type of plasticky/rubber polymer if I remember correctly. I never owned one and IDK what all` colors are sold BUT other than the orange/black faded mod was super dope!!) Between the 3, 4, and 4x, I considered 4x the least desirable IMO but that's just my peculiarities (there are some design things i didn't find appeali.
Good luck finding one. I went thru multiple 3's that all had power button failure (stopped clicking became mushy