Lucyna Gaj
a new conception of piano performance
To play well, it is necessary to AD-JUST the keyboard to the hands

PROTOTYPES

Replaceable keyboard (prototype) type G.L.C.F.-18 (white key width: 18 mm) constructed by my father Janusz Gaj, Eng.
Comparison of the G.L.C.F.-18mm keyboard with the standard keyboard
My hand on the G.L.C.F.-18 keyboard 
(I grasp 9.5 on this keyboard) 
Replaceable keyboard (prototype) type G.L.C.F.-17 (white key width: 17 mm) constructed by my father
Comparison of the G.L.C.F.-17mm keyboard with the standard keyboard
My hand on the G.L.C.F.-17 keyboard 
(I finally grasp a tenth) 
Replaceable keyboard (prototype) type G.L.C.F.-21 (white key width: 21.5 mm) constructed by my father. Comparison of this keyboard with the standard keyboard. 
My hand on the G.L.C.F.-21.5 keyboard 
(I grasp 8.5)