I've just obtained an approx '89 vintage Rhodes 760 in what seems to be (mostly) very nice working condition, according to the instructions in the user manual, but I have some questions. The manual is, well, not as clear as it could be, and the typos don't help either. For example, some (exotic) tones don't sound on the highest 1/2 octave. I suspect it could just be by design as the frequency is too high, but it seems odd. Other tone select buttons sometimes don't work, or are slow to select. This may be because of its old technology. The manual does not explain, or if it does, I haven't found it yet. Anyone familiar with the 760 able to help? Thanks. Stewart DIBBS