If you add the peripherals along with the two machines (4K lbs), total weight is 12K lbs for two "die cast stations". I suspect those are for Magnesium operation. They are not the same as the two (liquidmorphium) machines we received back in March.
In total we now have :
two Engel machines (carried over with PR) two Eontec 300-C machines (order back in March with PR) one Arburg MIM machine (with no explicit machine order PR) two LK machines (with associated robotic accessories) (order recently with no PR)
As far as the two Arro Enterprises orders from LK. Those order have association with explicit LK Model number. Note that order does include accessories in the same shipment. Total weight is about 96K and 56K lbs. If one subtract the accessories weight from those order, the net machine weight would be much less.
As IM pointed out, Arro Enterprise is just forwarding company. They associated with Mexico. Chances are those are the special (hidden) deal Ponzi Musk works with Mexico.