Pleurothallis? Heat damage?

[qbie]

I picked up this driveway freebie/rescue last summer and think it's some sort of Pleurothallis. Never grown anything like it before, but a Stelis restrepioides and Restrepia radulifera that I also picked up at the same time bloomed for me last winter. It was in rougher shape though. New leaves like the one shown are smooth initially but always end up "puckered" like the rest. Is this a sign of heat damage or something with my culturing?

Outdoors on my NNE-facing balcony with the Stelis and Restrepia. Media for all 3 are different. Stelis was repotted in rather large bark. Restrepia was kept in the original grower's inorganic media, and this No ID was repotted in the same large bark as the Stelis but with some sphagnum moss mixed in. Initially I don't think I watered the No ID as often as the others because it had the moss, but after new leaves ended up "puckering" I thought it might be dehydration. So since the spring, depending on how dry the moss appears, it's been on pretty much the same (most days of the week) watering schedule, though I did not start fertilizing any of them til July. The only other plant I picked up and tried growing in the similar bark/moss mix is a No ID Coelogyne and that seems to be doing OK. Wondering if I should try potting the No ID Pleuro in bark only like the Stelis.

Thanks for helping me figure out why this one doesn't seem to be faring as well!