From what I understand it uses a STOCK R8 spindle that has a gripper assy pressed into place in the upper side(straight portion) of the r8 area. Next it uses a CAT30 tool holder than has been reground to an R8 taper. Using the stock R8 makes a lot of sense as it is a production item and hence lower cost.

Anyone can take an Cat30 tool holder and have it ground to the R8 taper (;-)

So what is not to love about it? It will also fit where most cannot go in a tight home based shop. Alos single phase power, plug it into the drier plug if needed.

AND an ATC to boot. not just an add on device.

Just a thought, (;-) TP