Let's see if we're on the same page; after years of playing organ you're switching to piano and want to know if the way you play organ would work for piano?
Writing English is extremely difficult to me (reading is much easier), but I must ask an important question. I have been "playing" harmonium and electirc organ in the church for years and years (gregorian chant accompaniment, Perosi's masses, chorals, popular songs). The problem is thath I have always sight-read without paying attention to the correct movements, positions, relaxation etc. In your opinion, is it dangerous to the piano technique?