Many have had problems removing the old sight, they can be a real bear to knock out of the dovetail.
Others have destroyed the globe on the old or new sight also, my ex-gunsmith for one
, I had to wait for him to order another after he ruined it reinstalling it after the rechamber to 45-120, then he installed the replacement sight crooked
, I ended up fixing it myself, then learned the .584" was too tall and swapped it out for a .404". So you did good Dutchy!!
Tim