Originally Posted by
romperrr
Ah, I was wondering about that. Thanks!
And I too must part ways with the esteemed LeicaLad here, as much as I like and respect him.
Please don't grind on an original Simplex dropout. It forever alters, and ruins, in my opinion,
a classic French bike's raison d'être, not to mention its value.
Get a nice Simplex derailleur that fits , with no damage to the frame.