That's cool, Jose - thanks for that information. I see the conversion kit is £300 ($434 today's exchange rate). I just can't justify spending that much money after having spent so much for the bike and accessories I currently own. You just reminded me why I chose to add the extra chainring and settle on manual shifting. I might look into adding a front derailleur which would be a lot cheaper, if there is a way to do it without compromising the fold.