Jack Hidley explained why the MM shaft was a telescoping design. I think i still remember the gist of it. He emphasized that the steering rack doesn't like to have preload on the input downwards into the rack as it would cause premature failures. The telescoping design allowed for flexibility in install as well as eliminating that extra load on the rack.
I have the MM shaft on my car. Personally, I would rather not worry about set screws loosening up or potential issues with a cobbled together shaft, and like the MM design. I also like the fact that it's widely used, proven, and not prone to failures (i know of none). I will gladly pay more for something that's been vetted out and simply not worth my time to try and fab up my own shaft.
I have the MM shaft on my car. Personally, I would rather not worry about set screws loosening up or potential issues with a cobbled together shaft, and like the MM design. I also like the fact that it's widely used, proven, and not prone to failures (i know of none). I will gladly pay more for something that's been vetted out and simply not worth my time to try and fab up my own shaft.
