some pointers as to bots below:
Elite parts can only be found as loot in quthor or purchased from the auctioneer who is a random encounter in the same system
promethium trains faster
The generation cannot be upgraded
A bot can be trained further if you add components which increase its stats even if mastery has been achieved
There are elite parts also for the lower generations but those will only come with version 1.4 for completions sake they do not really make much sense
if you do quality control on a completed bot, you can then choose the skill which can be further increased by 10 to 30 points depending on your tech skill
bot values: a few million is already a good one but I have seen up to 120 Mil in version 1.3