Probably nobody looked up the ME reference, but to explain, the earlier toolholders I mentioned don't actually use a toolpost per se. They are separate tool blocks that get clamped down onto the carriage table. The clamp could be a quick acting one.
The nice thing is that the tool block can be oriented in any way or position -- it isn't tied to a post, and it also has the highest level of stiffness since there is no post and it can be positioned ideally on the table for the cut.
It also appeals to me because of its simplicity. I wish I could reproduce the articles here rather than just reference them in old ME issues.