To John on insert blocks: Just tried it on my MacBook, pressing two fingers in the middle of the pad gives the right-click option which allows you to inset the new blocks. It was the toughest thing for me to get used to on the Mac having no right-click. When I went back to Windows, the two finger tap worked on there two so it's become a bit of a habit across both systems now :)
To Dave on ceramic caps: Do you mean the schematic symbol being non-polarised caps? It's always shown the non-polarised caps, however it's something that bugs me, so PSUD3 will have polarised caps (pic shown for attention). The only danger with this, is that they will be wrong if someone is putting together an old school tube power supply with paper-in-oil caps. I may as well make this "choosable" :)?
