Beauty is in the eye of the beholder. I think there is always a temptation to optimize a horn that you have while the model is current. Once it gets 20-30 years old, the longing for the original condition (and the maximum value) become more important. I am sure that an overhaul by and excellent technician would involve all of the "tweaking things" anyway. That could be replating and aligning the valves, unsoldering and resoldering to relieve tension, checking the bore for blobs of solder or other obstructions and an overall cosmetic job. When finished, a properly restored trumpet is a masterpiece in its own right, perhaps better than new! In any case, a joy to the owner and hopefully an often played example that the newest is not necessarily the bestest.