Hi Harry,
Don’t discount the slightly larger QCTP, I went for the 111series ‘wedge’ style toolpost, which, although as standard is too big for my Seig SC4 lathe, by milling 4.5mm off the tool holders, it works perfectly.
Admittedly, I have a friendly local engineering shop who I am using to sort out the holders for me, and over Christmas I spoke with the guy who was given the job of milling them down. He said that hss wouldn’t touch them, but carbide soon sorted them out.
Cheers
Mark