Melodica-Me, I didn’t really touch my Swan for some time now, and I only refer to the Yamaha P37D recently.
The Swan is about 650g, and the Yamaha roughly 750g.
I guess that it’s not the weight but rather the need to balance it with my thumb while playing for long time.
I may also need to get used to playing with less pressure on the keys.
Just checked again, and I’m holding the grip with 3 fingers (2-4) and balancing with the thumb (1) and pinky (5).
Rethinking this whole subject, a strap may not be the solution..
Any ideas regarding reducing pressure on the thumb? only appearing after long playing.