Dd1 (11.5) has been having a few issues with her chin rest. She says it’s uncomfortable. Her technique/posture is pretty good so I don’t think it’s that. She’s growing seemingly before my eyes - we go through shoulder rests at a rate of knots as a result.
She plays a lot so has definite preferences but I’m not a violinist and a bit clueless. If I take her plus her violin to a music shop will they help?