Thanks a lot for all the replies super helpful. I might follow the advice and stick with the Simplex. Is a harder one to decide as for that I need to get a new front derailleur to match as well as shift levers and the ones that came with the bike were broken.

Thanks a lot for these images satbuilder! Very sad news about Scott, he seems to have an incredible skill! His posts are amazing. Unfortunately, I don't have the same skill but I might try it one of these days.