Originally Posted by
Winfried
I'll ask the user for feedback in some weeks/months.
From what I could tell, and like on my own Brompton, shifting down is no issue, but shifting up requires dialing the shifter in one frank move; Otherwise, the derailleur sometimes doesn't have enough power to pull the chain up.
For shifting up, I expand the lower lip of the inner cage, by soldering a stainless piece there. In the end, I tailor the cage to the rings and the derailleur mounting. The manufacturers may market a derailleur and rings as a set. I make a set out of whatever I want to put on for whatever reasons. I used to put in pins for upshifting on the rings that lacked them, but these days I achieve smooth upshifting by manipulating the cage only. My pins did not work that great anyway.