FWIW
I use a the original 4 way toolpost that came with my lathe.
The front toopost carries Diamond (Tangential ) tool, 8 mm Boring bar with CCMT06040 toolbit. and a Greenwood Tools jholder to use the 100 degree corner of CCMT0604 bits (For roughing or hard materials )
I made a look alike 4 way rear toolpost, which carries the large (3/32" ) Paritng Tool and two 1/4" toolbits to chnafer , Back or Front.
The only times that anyuthing comes out of the front post are for radius turning, knurlinbg, or the rare occasions for screwcutting.. Or even more rarely, a larger boring bar..
Keep wondering about changing a QCT, but over 19m nyesars have yet to be convinced that I need one and the holders.
But each to their own.
Howard