It looks like you have a great shooter. I was faced with a similar dilemma on a TL I owned, it bugged me that the front sight had been altered. The genious that did the work just filed off the rear side of the half moon and lowered it slightly to get it to shoot for his vision or whatever. My friendly gunsmith told me he could tig weld it back to factory dimensions and reblue it so that only he and I would ever know. Just the fact that I would know would be enough for me to mention it to anyone that ever considered owning it. Out of what I considered respect for its otherwise excellent condition I decided to trade or sell it off to someone who would appreciate it for what it was rather than have it further altered by my friend or Fords.
In another vein I have heard that about all Turnbull will do on old Smiths is to reapply the case hardening treatment if the individual parts are sent in.