Are the “mounting plates” different from the metal plates that came with the joysticks in my picture?
I assume I need a plunge router, cut out the rectangle, put in the joystick with 23-24mm from the top of the CP.
You don’t have to have a plunge router, a standard router will work.
Do I need to put a plate in flush on the CP too?
Can I only cut into the wood with a plunge router? (I don’t have one)
The link I sent shows MANY different options. First fork on the road is to layer or not to layer panels, (meaning one piece of wood, or more than one). Next and somewhat in conjunction is to keep the original shaft or buy a longer one.
I’ll assume since you’ve started cutting already that you want to stick with your 3/4” panel. I’ll also assume you want to stick with your standard shaft.
If you want to follow slag coins suggestion of 23-24mm of space from the bottom of the ball and the top of the control panel like this:
Then your mounting plate will need to be close to the surface. Although I don’t know the exact measurements for the JLW, you will probably need to have your mounting plate be close to 1/4” below the top of your control panel. This can make it awkward. You can route out your wood in the shape of your mounting plate from the bottom until you about 1/4” of wood left and screw from the top. Problems with this are you have screws on top and only 1/4” of wood to support the joystick, probably enough but if someone pushed down hard on the joystick perhaps it could break the wood.
Other option might be to buy an “S” plate:
This allows you to get the joystick close to the surface but your screws will grab more wood and they won’t be visible from the top. EDIT: you will still have to route from the bottom the portion of the “S” plate that is buried in the wood. See pic above.
You could also route out from the top down roughly 1/4”. This would leave you with more wood for support and get rid of the visible screws, but you would have to cut an additional piece of wood to fill in the hole in the wood. This would need to match the hole well, or else the wood may move around during play. It would also make the joystick difficult/impossible (without breaking something) to access if you needed to replace.
EDIT: you don’t need a plunge router. Just practice lowering your router bit into wood to the desired depth. Your router should have the abiltity to lower accurately with maybe a screw down function and measure the depth you are lowering.