I think when I implemented the simplest version of small-signal noise (about 10 years ago) it only took me a month or so, and then about a year later we had another effort to make the outputs more user-friendly, and that probably took a few weeks. That hasn’t required much refinement since it went into the code. In contrast, I think we added harmonic balance for the first time in the late 2000s, maybe in 2008, and we’re still improving it, and I can think of a number of improvements we should still do for HB. For example, HB for autonomous circuits is much harder than it is for driven circuits. So, our autonomous variant of HB doesn’t work as well as we would like.