Mine is also a '94 300Tdi. I bought it 2 years ago and the original spring also snapped 8 months ago. I replaced it with the LOF spring, and that snapped yesterday.
What could I be doing wrong?
I had one installed 8 months ago. Made a big difference. Clutch pedal was lighter and easier on the leg.
But yesterday it snapped, after only 8 months. So I'm not sure if I'll fit another one or look for something better.