I’ve made various repairs on pianos but only rebuilt one player. I have no experience with reproducers, having only seen a few.
The player I rebuilt was the family piano we all played as kids. Our parents required each of us to study piano.
Our piano had a player mechanism but it was in such poor shape due to vacuum leaks the player mechanism was basically non-functional. My brother and I could get it to work somewhat but only with extreme foot pumping. Years later I hauled it from PA to TN in a u-haul trailer and spent a month rebuilding the mechanism, restringing and replacing the hammers too. When I was done I could make it play rolls with the force of just one finger on the foot pedals!
I used it for years (new rolls are available for both new and old songs), then loaned it to several families. It now resides in South Carolina at my oldest son’s home! Still works well.
I know you can now buy kits to turn a piano into a digital reproducer (the first I saw stored the data on a cassette tape) and while rebuilding the player was both fun and extremely educational, the old-fashioned manual piano is all I need. (I bought a 7’ Baldwin in the 80’s and it’s a joy
, way more piano than I deserve)
Don’t reproducers play with dynamics as well as the notes and timing? That would add a valuable dimension.
JKJ