LGPE Eevee - Change Box Size

In boxes for a LGPE save, the interface creates boxes of 50 Pokemon. LGPE doesn't have individual boxes, so the choice of 50 Pokemon (rather than the traditional 30) feels a little arbitrary. Two issues with it:

1. Can't apply the box presets. They seem to assume the larger box size that the game technically allows, so when trying to apply one to the 50 Pokemon boxes, they fail, with a message like "National: Sorted by Species has more slots than Let's Go, Eevee! supports in box 1."
2. When ultimately transferring mons to HOME, it's harder to line things up, as HOME obviously works on 30-mon boxes.

None of these are necessarily breaking issues, but again, given that the choice of 50 mons is arbitrary, it seems reasonable to ask that it be kept to 30. (Alt version; allow the box size to be customized in saves for games like LGPE, which don't have a traditional box size)