Tried to post yesterday but for some reason, don't see my post - trying again.
I bought my M. tenuifolia about 4 years ago as a moderate-sized bagged Better-Gro orchid, from Lowes. This was not a "rescue" plant, but pretty sturdy and healthy (at least here, most of the Better Gro plants seem to be reasonably healthy if you get them within a month or 2 after they arrive in the store).
My Max ten has grown steadily larger in a 4-inch terracotta pot. Last year, it developed buds for the first time, but all but one blasted. This year, 16 blooms/buds!
My culture this year has included treating the plant like a Cymbidium in terms of temperature. It went outside when it was safe for my Cymbidium, came indoors when temps were going into the 30s F at night. I don't know why this seemed like the right way to go with culture, or if my plant did well because of, or in spite of, this type of care.