M48TANKER

I found your excellent photo of the bolt catch.  I have a sporter that doesn't have one.  I just acquired one and put it in today.  It will not hold the bolt back!  I installed it three times holding the mag. door down.  I also put in a tooth brush handle in the opening, checked the slot in the mag to make sure it was down.  Put it back together and still wont' hold.  I put a flashlight in the space behind the bolt, pushed the mag door down and let it go up.  The latch moves down when I push the door down, up when I let go.  Does the catch have to be bent up on the bolt engagement end or what?  Thanks for your help.

bigedac