[jhogendorn]

Yes, you need to design for what jlc stocks as basic parts to retain your sanity. Dont just slap down a 1206 resistor and call it good, jlc prob has no stock in that size in that value, but they probably have it in 0603. Once you get a handle for whats basic or very common extended parts, that sort of thing gets a lot easier. You kind of have to work backwards, ie if i need a diode i see what jlc has in basic and make my part choice accordingly.

[LoganDark]

I wasn't trying to choose a footprint/etc ahead of time. I would need, say, a 3.3KΩ resistor, and I would not filter for anything else other than the resistance yet, then I would choose a listing that I could use and that had a reasonable footprint and etc.