It is a copy of a Swiss Multifix 40 position tool post. They are strong and very repeatable. The holders are expensive even the Chicom copies. The German and Swiss originals are very expensive.
The center post can be changed out to whatever you want. Just use a bolt or CRS rod that fits the tool post. Make a T-nut for the compound and thread it . Locktite a rod that is threaded on both ends to the T-nut and use a flange nut on top. You may or may not have to make a washer to build up the tool post so you can adjust the holders for the size tools you use.
The tool post is locked down on the compound and the holders can be released and indexed in 9* increments and relocked without unlocking the tool post. The originals were pinned to the compound. You do not have to do that. It is a very strong set up just bolted down.
You can make a slotted rectangle bar the length and height of the slot in the tool holder and slot it for 1/4" and use that size HSS tool bits. Make it wide enough to allow the locking screws to be on the outside. Just drill and tap a series of machine screws on top to lock the tool bit down. That will enable you to get greater reach to get better clearance on certain set ups. That is one thing the rocker is very good for. It allows getting into tight places. You can do the same thing with the tool adapter.
You also can use small rocker tool holders clamped in the tool post if they will fit. That adds to the versatility of it.
Joe