After a few days of soaking with rust remover and a slight warming with a propane torch, I finally got the piece to rotate in the outer tube. After a few minutes of rotating, I could tap it out. Seems that it was just a small amount of rust. Some steel wool and more rust remover and it works fine. It was the lower leg section, which was good as there is the protruding food to help rotate and tap out, and it was in the left tube. Thanks for your help. The tripod hadn’t been used for about 35 years. I bought one of each back in the mid-1980’s for about $125-150 each. Ken