With apologies for going off-topic, I think no one could pretend that any organ could achieve 'perfection'. I admit that I used the word loosely, which isn't sensible given its proper meaning. As a brief aside, the week before last, during a group visit to Duruflé's flat, having warned Frédéric Blanc (the well-known improviser and inheritor-custodian of the flat and 3-manual Gonzalez house organ) that our rendition of Ubi Caritas wouldn't be perfect as we were a tenor or two short, he replied 'Perfection is not beautiful' and went on at length to explain why. Certainly, Duruflé's original manuscript that he then showed us was pretty close to perfect neatness! When Olivier Latry was asked what he thought of the Truro FW, having just broadcast live on Radio 3, he replied 'It's ok', leaving behind a slightly bemused questioner. Each to his/her own, of course. IMHO it sounds better than it plays, if you see what I mean. Hearing it, after traveling in Europe and listening to some of the finest organs of that period, gives me a real thrill that I really cannot fully explain. Perhaps it's the impact of the tutti in a relatively small building, but it is noticeable that when an exceptional musician who knows the instrument well, like David Briggs or Luke Bond, is playing (the latter the current assistant - you can tune in the Choral Evensong on Radio 3 today at 3.30 and hear him playing it!), that the relatively modest size of the instrument, problems of balance with the choir for a nave congregation, lack of a 32' reed, small pedal department, etc, do not seem to limit the myriad colours that can be achieved, remarkable for an organ that FHW voiced for a cathedral then without a nave (though I suppose you could say that luck took some part in providing near-identical twins to Coventry and Truro, being somewhat different bulidings). As for the Tuba, which is of much more practical use than in its former backward position, it can, as you are probably aware, be moved back to its original position, should future generations so desire.