because solid Axles and suspensions are the biggest problem for beginners i have started on my german homeforum a collection thread for vehicle axles and suspensions, and i think here should exist a thread like this too. feel free to post your own axles and suspensions. please with picture and if possible with an LDD file that it can simple reproduced.
here a first bunch of my axles
heavyplanet trackwidth is variable
planet with difflock
planet with difflock and power drivethrough
driven and steered independent suspension with 11 studs between towballs, unfortunately no ldd file possible
flat and solid axle
please post your own axles too