Here's our home built crank forward tandem. Wife has visual impairment and can only ride a tandem. With the crank forward design, we can stop without getting off the saddle. Used an independent pedal crank system so no need to tell her when we're stopping, or she or I can stop pedaling anytime. My first bike project with disks. Also used a 1x drivetrain. We call the bike Circus as I got carried away with the colors. Frame mainly built with square tubing. We store it standing up inside a small apartment as our old tandem got stolen inside the garage.