[ Ref. Steve Curcio in 210220 MMDigest ] Steve, attached you will find a tubing chart labeled for 1925 Duo-Art grand. It worked fine for my 1922 Geo Steck Duo-Art grand. If I can be of any of any further help, please contact me. Jim Quashnock Wichita Falls, Texas quashnock@aol.com.geentroep [delete ".geentroep" to reply] [ Tubing Chart 1.jpg (5,572 kb) [ https://www.mmdigest.com/Attachments/21/02/23/210223_034507_Tubing%20Chart%201.jpg [ Tubng Chart 2.jpg (6,420 kb) [ https://www.mmdigest.com/Attachments/21/02/23/210223_034507_Tubng%20Chart%202.jpg [ At https://www.mmdigest.com/Gallery/Tech/DuoArt -- "These diagrams for [ the 1925 Steinway Duo-Art were drawn in 1956 by The Morse Equipment [ Co. of Hudson, Ohio. The original drawings measure 42" x 30" [ (underside) and 30" x 24" (topside)." -- Robbie