I've read the biogaphy of his life, by Faubion Bowers, many years ago. That can't be accurate and doesn't seem to fit into the general picture in a general sense either.
The Wikipedia article on Scriabin is interesting, but includes an odd throwaway line: "He sometimes gave away pianos he had built to house guests." See: https://en.wikipedia.org/wiki/Alexander_Scriabin#Childhood_and_education_.281872.E2.80.931893.29
If he built pianos to house guests, then those pianos would have to be quite large.Mvh,Michael