Originally Posted by
himespau
Is there a safe shim that would allow OP to use 1" quill stems after threading, or, after all this, will he be limited to using 1 1/8" quill stems, which, to my understanding, are not all that common in high quality?
Yes there are good, safe shims available. But unlike a few years ago, I've discovered what seems to be a mild resurgence in availability of 1-1/8" quill stems. Some with removable face plates, some with traditional styling offered by the inexpensive (but still quality) brands, and even this fine specimen.