Still working on the underneath side of the play field. Went through the other two drop target banks and the rest of the kick-outs and pop bumper.
One of the kick-outs was getting caught on the return and had to bend the metal and adjust the plastic cover. After a little bit of time, kick-out now works smoothly.
I also replaced quite a few light bulbs when I was working on the mechanics.
Next step is to plug everything in and see what is working or not. The topside of the game looks like it was done, so I am not going to spend too much time on it unless something warrants me to.