Ahhh...the joys of having tiny hands...haha. My fingers also don't open far enough. I'm kind of disproportionate since I'm small up there (hands included, of course), but big and wide in the middle and I have long legs. (Wish they were fingers instead...)
How many pianos do you have in your studio? (I have one grand, one upright, and a synth.) If you have two pianos, you can use one regular one and you can fit the Steinbuhler on the other. (Yes, you'll still keep your original piano--you only change the keyboard since it's removable. The technician does that kind of stuff. I believe that's what I read on the website.)
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If noise means uncomfortable sound, then pop music is noise
to me. - Masami Akita (Merzbow)