The Haas four place tool turret has good repeatability. Certainly within +/-0.0001" on a turning tool. For indexing it with a long boring bar you may need to find another location for the mounting of the coolant nozzle. It normally goes on the cross slid just ahead of the toolpost and long tools will hit it. For holding drills I made my own holders.
Have you read the various threads/posts about the TL1 in the Haas forum? I posted some pictures which showed the tool holders I made.