How to Enhance Mount, Ship and Wagon Gear, and Artisan Rods
The artisan rods follow a slightly different enhancement path than weapons and armor. Firstly, you can fail at every attempt at upgrading, so +0 to +1 can fail. Secondly, you can only enhance these items to +10. Thirdly, starting at +7 to +8 enhancement artisan rods can fall down a single level if you fail, much like enhancing beyond DUO.
Mount, ship and wagon gear can also fail at each level from +0 but do not risk dropping a level until reaching +7. It is also unclear if they follow the same enhancement chance as the artisan rods. Some personal test of mine seem to show a different chance percentage.