Rapier iii

I may sound like a fool but im not taking any chances on breaking the rapier III adjustable i got today in a trade,,,,,it needs to be at over 12 volts and even then seems flat...there is hardly any re-coil when you push your thumb against the needle bar,,,so how do i adjust the throw? i notice a screw on the outside of the back and a mini screw inside it,,,,i get the feeling its the mini screw.....a diagram or video would be a blessing!!! better to sound like a fool than bust the machine,,,,i had two rapiers before but they were fixed stroke.

thanks guys...

Loosen the screws on the outside of the frame. Drop the motor out of it & you will be able to move the cam to a different hole. It is very easy.

easy when you know how,,,,cheers my friend ill do it in the morning.....