Ron, if you're open to considering other brands of mid drives, consider e-RAD, they have a throttle along with the pedal assist and shift sensing. You provide the bike or find one ready to go. I think e-RAD's distributor, Lectric Cycles sells complete bikes with the e-RAD mid drive. Talk with
@Chris Head, he can go over all of the fine points of their system.
All of the bikes with Bosch motors are beautiful machines but none of them have a regular throttle, a few have the 3mph walking throttle.