It's perfect for my JR 9303! The springs are available as Futaba replacements or FRSKY replacements. I heard most people go with the Futaba springs. I'll order a second for my other JR radio soon. Can you fabricate one for the JR 11x? It's 06173 at Japans JRPropo site. Great job on this! JR Americas and Horizon won't sell the individual piece.