Thanks for the reply, makes sense and half expected as much re advertising modified bikes.
What I want vs what is possible vs what I’d consider reasonable expense may be the conundrum! Ideally I’d like a disk braked, geared and dynamo-ed Brompton that is lighter than my current dynamo-ed S6L. Guess that to get this one would need to go Ti rear frame and fork? What would be a ballpark cost something like this? Feel free to PM if that’s easier, or let me know an email address I ca send questions to.