You will find several Onspot tutorial videos on Youtube. One of them explains how you, by adjusting the position of the cylinder, will get clearance for the chain wheel. Learn more here.
Is the Onspot chain wheel hitting a stabilizing bar or the prop shaft when you are installing it? Here is how to easily adjust that. Move the Onspot cylinder and it will change the arm and chain wheel into another position. Free from hitting obstacles.
You also have the Onspot E-Training portal. It is always available, on all platforms. Sign up here. It is free.