The mixes all look good. Depending on species/hybrids , seedlings/mature plants I would mix in alittle conifer pine needles or leaf tree compost depending on if they are acid lovers or not..
I probably would have done the same thing!!
Look what happened to Paph. delenatii as another example!! And so many others from raping the natural habitat!! How many are lost, and how many may never be discovered!!
I was going through a Google search & found this!! It is in PDF file & quite large. It has some good info in it!!
http://www.werribeeorchidclub.org/PDFs/northamericancypripediumsniledusdieker.pdf