Quoted from bill354:UPDATE - Well I took the trap door assembly apart again, but there is no adjustment on the shaft. But I did resolve the problem by putting in a slightly stronger coil #FL-11753 to raise the trap door. Apparently the coil is just enough stronger for the trap door to raise far enough for the hold to kick in. Wish I had this coil in stock when I started this project.
By the way can someone tell me how to edit the title of this particular posting? I have looked all over pinside and can't find out how to do this, but I see other people doing it on their posts.
I had the same problem when I replaced the bracket housing. i upgraded to the same coil and the problem was solved.