By DX, I received an F13 with the head without PILL bat with a XM-L2 
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Everything else seems to me the same as the F13 that we know; I’ve already changed modified the driver to remove the memory
I also added the thermal paste
I have ordered 2 pieces from WB last month and they have yet to arrive. I rather have the original pill than the XM_L2. I am going to swap it anyway.
What size is the driver? My F13 with a pill has a 20mm driver.
Well that's interesting. I suppose it's more like a "shelf" (full bottom under LED though) built into the head? Wouldn't this be better for thermal management? (Look like annodization should be removed though.)
-Garry