The Proficient has the same shape handle as the Bushcraft, it is a rounded out version of what I did on the ATS34 knife you have.
Think this is the one? I hope it works well for you and is still giving satisfaction. I still have my version of it and it was my go-to expedition/canoeing/camping knife for quite some time.
PICT4095 by
Last Scratch, on Flickr
More recent stuff with a Proficient. All mine are stainless, all hidden tang. I am still developing the handle design, especially for smaller sizes.
IMG_1006 by
Last Scratch, on Flickr