My thanks to Martin from Germany that sends these images of a 1994 Eddy Merckx catalog featuring an MX-Leader. Of particular interest is the text on the first page and the diagrams showing where the tubeset ovalization is. The text indicates that the MX frame is built of different Columbus tubes: Max, Minimax (top tube) and SLX (seat and chain stay).
Click on photos to enlarge.
This blog is dedicated to all things related to Columbus MAX, MXL and MINIMAX. If you have a contribution please email me at firstname.lastname@example.org.