1- Same die polishings lines in middle of TF as VAM
6A (old VAM 6)
,same die polishing in LIBERTY,
same die as VAM
6A without spiked TF.
I think this is the key. The old VAM-6 was actually a 6A? I think the listings are a bit crossed up maybe. In actuality VAM-6 may not exist with the chip 8 except possibly as you noted, a LDS or maybe VLDS where the tail feather gouge erodes away or is polished away. I'll be interested to see what JB has to say about it.