rom-converto does by default when converting .cia to .3ds rounding up to the next power of two like real cartridges do, i can see about adding a trim flag so it auto trims (like GodMode9, 3dsconv, ctrtool can do) when converting .cia -> .3ds so...
Nice to hear, yea the Z3DS so far is sadly only supported by Azahar but one of the maintainer made a pull request to FBI to also allow installing (decompressing while installing like for example its common in the switch homebrew scene with DBI or...