Continuing the slaughter of helpless hulls in the name of science, I came up with some interesting information.
After 130 frigate hulls blown up and salvaged (without bothering to insure), no circuits were salvaged.
10 cruisers (insured) resulted in circuits (about half the salvage).
I'm lucky the experiment is happening with the basket of minerals being so low that insurance fraud is the order of the day. I was actually at a profit without needing to salvage a single wreck. The issue for my wormhole sourced rigs though is that after 130 frigates I'm fairly confident that circuits don't drop from frigates (although they are a great source for the other salvage). This means that sacrificing cruisers is necessary for building rigs if one is doing it entirely withing wormhole space. Annoying (and expensive) but since it was looking like it wasn't going to be possible at all, quite possible.
I promised the numbers on all of this but the spreadsheet is not quite ready yet.
Flying Comes to WoW Legion
15 hours ago