I have owned an electric mountain bike for many years and, other than the usual expenses, it really was very reliable. Because I am getting old and finding it a little heavy I decided to sell this and replace it with a much smaller E-Plus Commute electric bike. This is much better for my needs and much lighter but the problem is that it doesn't have a separate throttle control which my mountain bike did. It is now proving quite difficult to pedal due to arthritis in my right leg so I was wondering if anyone knows if its possible to add a throttle control to this machine??