Talk:Engineering Lab/@comment-70.176.108.146-20120831074840/@comment-4557698-20120904232827

Partially correct. It is possible to upgrade after L5 without boosts. I made it up until L7, for now.. Since in theory everything after L5 has the same chance, it should be possible to reach L13 without buying anything, even if it's ridiculously difficult.

You are incorrect about numbers related to bars, though. L1 to L2 and L2 to L3 have both 8 "%", but bars are different.

Sidenote: upgrading L1 is not necessarily easy as you say. I managed to fail three upgrades in a row. But that's just me being unlucky, I guess..