The problem With the Park Fixed Cup-Tool is slipping. On my Gitaneframe I had a stuck cup and the Parktool slipped. With a Bar F-clamp and some large steel washers I secured the Park Tool in Place and used a long metal tube to gain some leverage . No slippage and the cup came off easy.

The Stein tool only works if you have a wrench designed to fit the cup. If you have one of those odd-ball French octagonal cups, or (even worse) the cheap Italian 3-notch cups, you may not have a tool that the Stein attachment can work with.

VAR made a shop-quality fixed cup tool with different jaws to fit cups of various design (but not, AFAIK, the nasty Italian 3-notch version), but it was quite expensive, especially if you wanted the full set of jaws. The tool is still in production, but I think only one jaw type is offered now.

Yeah, several manufacturers made and/or still make traditional fixed cup tools. These work well, assuming you know which way to turn the threads... Older shops usually had a campy and a VAR. I should have said Stein or similar fixed cup tool.

I once removed the fixed cup on a '77 Gitane Gypsy Sport using the Sheldon nut method. It turned out that despite being a Gitane that model had an English threaded bottom bracket, which I was lucky enough to discover before I starting trying to force the thing loose. Even so, it took an awful lot of force. I believe I ended up using a three foot pry bar on it. Here are pics of what my "tool" looked like afterward. It made me so happy I kept it, and it's still in my tool box looking just like this.

I used the Sheldon method from the non-drive side to remove the fixed cup from my '71 Gitane. It looked a lot like Andy K's pix above when I finished, but it removed a cup that had been aggressively loc-tited into place. It WILL work - but add me to the chorus asking what model and make and year frameset we are talking about ...

Here's another vote for the Sheldon Brown method - removed a stuck cup on my '73 Gitane.

Try clamping the frame quite solidly and then using a hammer to tap on the end of the wrench. I have found that to work quite well with stuck bolts or nuts.