so yeah I went to switch over from hbm reloaded to this mod and all my existing saves crash when trying to load with this error:
The game crashed whilst ticking block entity
Error: java.lang.RuntimeException: Slot 2 not in valid range - [0,2)

Is it possible for it to be fixed or is it a problem on my end?
if you need it here's the full crash log: https://pastebin.com/wmEJQLi5

Ah thats an easy fix. Just remove the battery blocks before upgrading to extended.

ah thanks will do :D