This suggestion was put in a while back aswell got alot of upvotes but didn’t get implemented i hope now it does i give upvote for this one

I think it was going to be implemented, but not sure when

i suggested it and it got implemented but only for electric furnaces and not for other slimefun machines

When the slot layout of a machine changes, the items held in the removed slots are deleted. This is the main roadblock. We would need to give people a few days notice so they can move items out of their machines