Any experience with installing after market sostenuto pedals on grands with bass sustain?
Is it expensive and is it difficult to do? Thanks for any input.

Check with Renner on replacement back-action kits. Not cheap.

Tom

I don't think Renner's kit includes the sostenuto blade, brackets, and coupler:
http://rennerusa.com/Underlever_System.asp

My thought would be two words: Im Possible.

The back action would probably have to be replaced anyway, in order to get sostenuto tabs to work with.

--Cy--

it depends of grand piano you have. I telling you....sostenuto pedal can ba made in every ggrand piano. sometimes it needs to repalce a back attion.. but it can be made