With the strikes for the quarter hours coming too quickly it was necessary to figure out a way to slow them down. Fortunately (by chance) the exiting balls pass below the quarter lever strike mechanism on their way back to the second lift. It was about 1 second after exiting the cup on the quarter lever that the ball would pass below the lever mechanism. That seemed like a good delay time.
I put a bar across the columns to mount the trip lever assembly. It also helped make the structure more ridged.
A pivoting piece was made with adjustments for throw and mounted on a block so that when a ball passed down the track, the upper part would push against a latch holding the quarter lever down, releasing it to accept another ball and start the strike cycle again.
This solved the issue and provided a nice pause between the strikes,
The latch the caught the quarter lever had to be weighted to suppress bounce and assure a solid latching to occur.
The movie is in slow motion and shows the action of the latch and release working.