I picked up a used Ti2 recently. It was in immacualte condition.
However I noticed, after playing for a while, that some keys are a bit noisy and I can also feel there's a mechanical difference while playing. Especially when releasing the keys they make like a click. As if they are not perfectly aligned. The noise is a bit like it comes from a spring inside.
This only happens with some black keys, but they are all working fine and it comes and goes.
Is there something that can be done about this apart from changing the whole keybed?