@freemo Well I have *some* idea 🙂. I owned a Greenspeed GT ‘bent (http://greenspeed-trikes.com/comparison.html) for about a decade until a couple of years ago. Rollhof hub gears, disk brakes, Schlumpf dual chain ring... Great fun for long, fast rides around the extensive bike paths and rail-trails near Melbourne. But — although it ‘folded’ — hard to transport & store. Now I sometimes use an upright that I find scary even at slower speeds! Enjoy!