What size machine is this going on.?

I have thought for a long time that the BT30 spindle Cartridge that tormach sell as an accessory could easily be made into good ATC.? Again not overly cheap but doo-able.!! Though needs a large strong machine.!

I'm going to enquire with a company I deal with who make,repair, high quality spindles. The stupidly expensive multi KW spindles with ceramic bearings alone costing 1000's but I did wounce mention could they make a cheap ATC cartridge and they said possibly and draw something up and they'd have a look.? . . Never did maybe when I have more time i'll look into it more.?