i have done a couple of 8910s, 1stly is the spring end in the correct position-goes into the round plastic opening at the bottom of the board. is then held in place by the metal bridge which is screwed down, fiddly to put back on. i have never had problems with its running, when done right.ar the runners in there correct position? ar the running clips correctly positioned on the sides?
all the best..... u know where i am if u need me. |