i use to sell and teach these estey organs at fletcher music in florida. i remember bill kelly of lowery . he was a good musician, programmer. as far as the organ , overpriced , cheap constuction. the dicsovery was entry level, freedom was 2nd level, i think there was 2 or 3 levels after that. the idea was as you progressed in learning to play ,you would want more and move into the next level. very successful plan back in the 70's and 80's. funny how yamaha,korg, arranger's are doing the same thing today. that business for ya. Lol.