Yes that was the type of whip I was talking about. I was sad not to had gotten one, but now I don’t feel so bad. No taper, oh no.
Now back to the ones I made. Yes, they have a standard three step taper. (Or a one third taper.) I brought them with me for a photo, but left the camera cord at home. (no card reader here either.) Turns out I had the first three prototypes in a box at the house. One like what you have with no taper, one with a two step taper, and the best three step.

It will be next week before I can get any pics.

What do you use as a core? I use bead chain myself.
I also found a paracord bullwhip pdf file with great pics and tips. But no place to host it right now.
Where do you get your cord from? I was going to try cheeper than dirt, they have it in a 1000' roll.