LTB Files

Hey hey, is there any way to shrink LTB file size? or like edit them in a program.

I know the LTA -> x. But I cant revert it back to LTB.

What is your question? First you say that you want to shrink a file size (i.e. from 200kb to 37kb), then you're talking about reverting.

Editing them in a program might give you edges/options on shrinking the file size.
LTB -> LTA (Then edit the LTA File, as far as I know there's no direct import of an LTB file to a program to edit them)

I've got a few ideas but non seems to be working. I thought I knew how to do it, but im failing badly.