Yeah I don't blame you, that key is a nightmare. I don't think this is P.juniperiana, the leaves on this plant aren't concave. I was thinking P.capitella might be an option at your altitude?
@Tapirlord lost this sighting amongst everything else. I'll have a look at that one, cheers! We got to hear from the lovely guy in charge of those keys in a recent Botany tutorial, ans he acknowledged they're a mess, at least. 😅