That is some piece of work, imagine the time and skill that went into creating this. You have done well in retaining all the detail, the light is very subtle as if in reverence to such a beautiful organ. Thanks for sharing your image.
The only thing I can be even slightly critical of is the light at the top of the organ…or rather lack of..so some of the detail is lost there. But there probably wasn’t much you could do about that anyway. Also I’d crop out the top part of the shot to lose that light fitting.