@User: Depends what you're doing. Pretty much all the changes I've made to magic since MPW-one are in support of analog design, so if you're doing digital design, then anything since 8.3.130 should be good. For analog, and in general, I recommend getting whatever is the most recent version. We will freeze the version number of all the tools that we're using for the prechecks and tapeout soon, so whatever is current now is going to be in that list. Similarly, for netgen, I fixed a bug yesterday that would affect analog but not digital; for digital, netgen version should be good from 1.5.170, when I finally resolved the issues with what makes netgen run for so long on digital synthesized layouts, and removed the "-full" vs. "-fast" switch, since it is no longer necessary.