Well, all 3 of us are right about the BXA tool holders, Dabbler, Susquatch, and myself. I use mine with h.s.s. a lot, and not always with the " right" size shanks. 1/4", 3/8", 1/2", and 5/8" square h.s.s., not held in a holder. Shims "under" the h.s.s. to bring to near on centre height, adjust with the height adjustment to fine tune. The few tool holders I had for carbide so far have disappeared when we moved, along with some of the carbide, and the tool holders and not all the bit holders were the rite size.
I like to have as large amount of engagement with the post as possible and I don't like the screws real long to hold h.s.s. or tool holders. As long as the adjuster has some justment, i'am happy. Just me and the way I like to do it.
I was also talking about the anvil under some carbide inserts, couldn't think of anvil at the time.
It can get a bit confusing at times, the carbide insert/bit is put into a tool holder, the tool holder is put into a tool holder, then put on to the post. I also have two different quick change posts, different sizes, different lathes. The last tool holders/block I bought for the small unit don't fit over the dove tail. Oh well, on to the shaper one day.
Sorry if caused some confusion. And I am still using the 4 post or the quick change as for what ever job as needed.
I also use lantern post or small shank shaper tool holders in the 4 post or the quick change as needed too. Ye ha, h.s.s. Yes there always is a place for it.( wheres the laser for lathes and milling machines,)