Upload & Sell: Off
De gustibus non est disputandum...
Personally, I have little nostalgic attachment for purity of "all original" condition. Instead, I consider putting in the effort to keep an old item doing what it was built to do (e.g. letting a lens keep taking pictures, instead of sitting "unspoiled" on a shelf) to be a high tribute to the enduring quality of said item.
OK, I respect your take on it. However, why butcher $4-5k lens with a Dremel tool when it can be used unaltered, perhaps soon, with no ‘modifications’ by future DSLR/mirrorless, Leica M (M240 with an adapter) and R camera owners?
It’s not about the potentially invested $$$ for me, but rather… as you said, De gustibus non est disputandum