I think that the credit to Paul McNulty is for building a copy of a 1795 Walter Fortepiano, rather than doing a restoration. Jerassimos Coidan Takes advantage of the light action to give an exciting fast performance. The instrument has a sharp attack and quick decay. The Alberti bass throbs. The semiquavers rocket skywards. The passages, where repeated quavers get hammered, work. The crazy rhythms at the end are clear.
Did Beethoven write to take advantage of the sharp attack and quick decay? Did Beethoven write to mitigate the disadvantages of the sharp attack and quick decay?
There doesn't seem to be anything here yet