So, I thought I'd chime in again here... I like the Caballero, beautiful kit. I have a couple, been meaning to get some more, so this spurred me on. I noticed something though, that stood out. The nib on the parts pictured in the OP, seems to be different than what I've generally seen for the Caballeros.
Now, maybe this is just due to time? Maybe some time ago, the nibs were different, and they were changed sometime in the last...N years? I don't know, only been making pens since around 2021. The current Caballero as far as I can tell, has a round nib section. Everything except the nib in the parts pictures, says Caballero to me...every other part looks the same. The nib pictured, however, appears to have a hexagonal one? I have been looking for a similar kit...so far haven't found one. Is there any chance, this may have been "kit bashed" a bit, with a part from another kit swapped in? The nib pictured, although gold, appears to be the same as a Baron? Baron rollerballs have that hexagonal nib, but the rest of their parts, are a little bit different. Notably, the threads on Barons (also called Navigator if sold by Woodcraft, same exact kit as far as I can tell) are always black, as far as I've ever seen. The threads in the kit pictured, however, are the same as the rest of the kit parts (gold?)
Anyway...just a small discrepancy I noticed. I've never seen an all-gold Baron or Navigator. In fact, lately, I don't think I've seen gold in either kit...maybe ever? I've seen chrome and black, gunmetal and black, all black, silver & even copper...but I don't think I've ever seen gold.