Ah, lack of availability makes a lot of sense given these community remakes are now two decades old. Improving the content layout also sounds great. I will check them out, thanks!

Kinda weird to differentiate between B/X and BECMI, considering Companion/Master/Immortals are extensions for higher level characters using the same Basic/Expert rules.

Edit: the distinction still seems pedantic to me, but these helped to understand the differences in the context of OSR:

https://leyline.press/blogs/leyline-press-blog/a-comparative...

https://leyline.press/blogs/leyline-press-blog/a-comparative...