Hi @greel
If you're replacing the LCD panel then to ensure that it bonds correctly with the frame enclosure, you need the ruck weights distributed as shown in the [document|40755|service manual] (see p.35→p.36) to make sure that does.
Alternatively you can use a ''Shot bag filled with steel shot, not sand, to ensure proper weight displacement.'' Using this is also shown in the manual, on the same pages.