Rig Invention: Tech II rigs are the highest possible quality of manufactured rigs and since there are no faction rigs, they're the best in the game. The blueprints, however, are hard to get hold of. Invention is the quickest way to make MapleStory Mesos a Tech II rig blueprint and while there are a number of key differences, it is achieved in the same way as module or ship invention.
One key difference is that rig invention uses the 'tuner' type of data interface. For example, if we want to invent a Capacitor Control Circuit II blueprint, we will need an Occult Tuner Data Interface and a blueprint copy of the Tech I version, the Capacitor Control Circuit I.
The option exists to use a Tech I base item in the invention process to improve chances, however it is advised that you don't do this as the chance of increasing your success doesn't seem to be improved significantly and the cost of a Tech I rig can be quite high depending on the type of rig.
Since there are no named or faction rigs, the increase in the chance of success from using a base item is not considered to be worth the cost.
The BPC used should be of the maximum number of runs - which for rigs is 1000 - to ensure that the Tech II BPC that is output is of a higher number of runs.