I just tore apart my FD drop target assemblies and here are a few tips that may or may not be mentioned.
1. For ease, remove the drop target assembly from the game. This is going to entail desoldering wires to two coils (4 wires), the series switches (3 wires), the 10 point switch behind the bank (2 wires) and series scoring switches (2 wires). Mark the wires before desoldering. The switch that senses the horseshoe is attached with two screws so that comes right off. Be careful as there is a spring steel flap behind.
2. For the 4 yellow cowboy targets, there are 4 wire U-shaped pieces attached to the top of the bank. These are connected to one of the coils on the drop bank that will knock the 4 yellow targets down when you complete both banks and it resets so you can just shoot the black horseshoe targets. If you remove these to clean they are a PITA to get back just right. Too far forward and the yellow drops won't reset properly. Too far back and they won't knock the targets down after you've completed both banks and they reset. Just an FYI as I have to remove one of my banks and adjust 3 of them.
I would highly recommend removing the banks from the game. These GTB drops are very hard to replace in the game with the two springs. I made a spring installation tool from a paperclip and with needle nosed pliers made a small hook on one end. You won't get the springs back on with your fingers.
