Hello. My name is Lonnie Hyde. I am getting back into the hobby after a very long absence. Before I left the hobby over 20 years ago, some of the boaters were starting to experiment with solid drive shafts and small "U" joints instead of the flex shafts. Did anything develope with this, or did it just go away. Have there been improvements to the flex shaft systems? These are some of the things that I need to catch up on, as not to make serious mistakes as I start over in the hobby. All suggestions with this topic will be greatly appreciated as with all the new kinds of hardware in use today. Please advise when you can. Best regards, Lonnie Hyde.