Originally Posted by Unca_Sam

I had a similar thought, just a graduated set of sockets with 'peanut butter tool' style handles on them that can fit inside the socket 2mm larger to cover 7- 15 mm. Make the 7mm socket the tallest, and the 15mm socket the shortest and Bob's your uncle. Maybe instead of PB wrench style, just use the same stamped steel they use for cone wrenches and put a ring matching the bore on one end instead, then weld that to the socket to spread the torque out.