I am reaching 70 years old...basically healthy but I have a very difficult time standing and walking. Pain is mainly in my legs. Last MRI showed problems on several levels, slipped discs and stenosis. Spine Surgeon today suggested having just one level done L-3 &4 as it is the worse. He would do minimally invasive surgery & thinks doing the one level will help me without a long recovery. Anyone else have one level done even if 2 needed?