I am not a teacher so I apologize if I am intruding here. I have no one else to ask.
I am used to an acoustic upright and am thinking of getting an instrument that has heavier touch, in this case a Yamaha Avantgrand with a grand piano action but it could have been any other grand or upright with heavier touch than my present piano.
I have tested it and like it but find it hard to play fast and at the same time with low volume and control. E.g. the delicate middle voice in Schubert´s g-flat major impromptu or maybe the lyrical middle part of Rachmaninov´s g-minor prelude op. 23:5 with it´s arpeggiated accompaniment in the left hand. That was hard for me to play on the Avantgrand without it sounding clumsy and insensitive.
I understand of course it is impossible to predict if I can adapt to the new instrument, but in general, what could be expected? Does people in general quickly adapt to heavier touch and develop the technique and strength needed. Is there a bigger risk for injuries with heavy touch? What to think about in the beginning before I have got used to it? And perhaps there are advantages, e.g. possibility for playing with greater expressivity when having adapted to the new instrument? Maybe it is just what I need and after a while I will just laugh at my worries and be glad I got it?
I'm not a teacher either, but when I was a student, I never
once played on a grand (not even for my annual piano exams) until eight years into lessons, when my new teacher had two 6-foot grands in his home, where I had lessons. One had a rather heavier action than the other, but both were heavier than any piano I'd ever played. But I was still practicing on uprights, in the university's practice rooms. In the first few weeks, I kept playing 'ghost notes' and couldn't manage ff.....
It took me a while (as in 2-3 months) to get used to those grands, but bear in mind I only had access to them during my lessons, i.e. one hour a week.
Since then (after university, and having finished with lessons), I'd played on all sorts of pianos, from broken-down spinets to 290cm concert grands, and got used to being able to adapt to any instrument within minutes.
These days, I practice on a digital (with a lighter action than the AG) but play my recitals on a six-foot C.Bechstein grand, with no problems switching whatsoever......in fact, the grand's action is no heavier than my digital's. When I'm downtown, I play on Fazioli grands (which BTW have smooth buttery actions, unlike the AGs) in showrooms whenever I can.
If you want to be a decent all-round classical pianist, sooner or later, you'll have to get used to playing different pianos, so you might as well start now. Take things easy at the beginning - don't go flat out with speed and power (no Chopin Op.28/16 or Rach Op.23/2 for instance
) on the AG until you can play scales and arpeggios smoothly and evenly on it without tension, then try mastering voicing chords on it to get your pinky used to the weight & inertia required to bring out melodic notes.....otherwise you might find your RH pinky's joints aching with D899/3.