SlotDummy is used to hold "dummy" slots in translocators. Unfortunately, it doesn't override "cakTakeStack" (returning false), so my mod believes any SlotDummy to be a valid slot for taking items from. This is almost certainly wrong, so I would advise overriding "canTakeStack" to return false, and close the dupe bug. It may be possible to expose this in other ways as well, but my mod makes it trivial to exploit.

Whops, wonder how long that one has been sitting there..

Fix should be on curse now.