I just had to cobble something together for this operation on 2 Italian BBs today. I used a long, 1/2 inch bolt, with the head and some fender washers on the NDS, and a 4 X 4 piece of MDf I had laying around with a Tee nut in it. I put a 12" crescent wrench on the flats, tightened the bolt with a ratchet, and gently (or using a hammer as the case may be) teased the fixed cup loose. I was too busy to take pictures, so you are going to have to imagine it! Not pretty, but it sure did work, and one of those BBs was tight, perhaps Locktited! It is days like this that i wish i had a professional Park repair stand, the home version always wants to move away, or fold up when i torque on something.