Masdevallia potting medium?

[Sekhmet]

Hey all,

So, my Masd. Sunset Jaguar is here! And it is a huge, huge division (20+ growths) with 6 flower stalks! I am so happy I went with Mountain Orchids!

Anyhoo, it was sent to me in a mesh pot that it had obviously been in a while (also nice!) packed in sphag. So here is my question:

I am hesitant to pot things in sphag...I have everything in fir bark/sphag/charcoal/perlite mix, including my D. Lotax (although there is a wad of sphag around the D. lotax roots, and upon unpotting the other day, those roots were HAPPY!)

I have pure sphag, and also a fine bark mix that I could add sphag too. Is it likely that I will overwater a Masd. with sphag? Should I just pot it up in pure sphag? Seattle is a pretty darn humid place most of they year and I would hate to give this baby root rot.