Hi to every one i have a old victa mustang,my problem is the catcher wont stay cliped on,i attached 2 photos showing the rear flap on the mower ,the flap comes out of its pocket and lets catcher drop off,on 1 photo i have put a spacer nut on shaft to stop the the rear cover slidin along ,what should be there ,where can i see orget a parts view of this flap help please