Many times you can make a difficult task much easier by using the correct tool. Removing the B1-accumulator retainer on the A750E/F, A760E/F/H and A761E valve bodies can be very tough.
Different terminology for the same part has been an ongoing problem in the transmission industry ever since I can remember. When I was learning to rebuild transmissions, Chrysler Torqueflite and Ford C-4 transmissions were always in the shop. These two transmissions had the same power flow, but all the internal components had different names.