Acquired this ENCO from an estate. It wasn’t loved or maintained. I’ve done a total strip down and spindle seems to be MT3. Machine came with a truck load of MT3 and MT4 tooling, mostly huge new drill bits and reamers. Trying to figure out if the spindle is dedicated MT3 or otherwise. Spindle has a spanner flange with unused four bolt pattern, pic attached. Anyone have experience with such a spindle?