I just received a 5 pack of the new cotton BVCs for the K1 from FT.
Having one of the coils disassembled I'm sure that there are only small cotton pads inside.
Also the box has the small slip stating that you should wait 2 minutes to allow the cotton to become saturated.
The scratch code is authentic too.
So far I was only happy with the BVCs when I gutted them, drilled a 2 mm hole and put in a normal single coil with a cotton wick.
Unmodified they just never worked for me.
At first I thought, great Aspire now went to cotton.
IMHO, vapor is much stronger with the new BVCs. Just the taste is

I washed the coil head under hot water, rinsed it several times with
juice. The taste became somehow better, just very weak.
Still even after half a tank it's very weak compared to my modified single coil Aspire heads.
Let's see if the taste gets more intense after a whole tank.
What's your experience?