[gotgreen]

Apologies that it was not clear. The shifting bearing block is loose on the frame and has to be tensioned. Theraband is connected to the top of the shift plate where the pneumatic cylinder is attached and tensioned to the frame vertically. This seats the bearing block lower lip into the frame when the wheels are up. Also, when pivoting the blocks the chain is loose when up and tight when lowered. Ideally the pivot point should be moved out to reduce this issue. A small piece of theraband can be connected to the bottom of the block and tensioned to the frame. We are not using this. We just attached a small tensioner and it is working fine. The drivetrain complete w/o electronics is right around 30 pounds. I will double check the wieght when back at the build site.