Is there already a posting or video that explains the big picture of wiring a dashboard switch panel and whether I need an associated fuse block?
in general, a fuse block helps to distribute the loads properly. typically they have a main feed (big wire) from the battery that distributes power through the fuses, then through switches, to the loads (little wires, relatively). Depending on the size of the load, you may also need a relay if the switch cant handle the current.
1) I’m thinking I need to (or should I?) buy a pre-wired panel of
switches and voltmeters and transfer the switches and voltmeters to the custom panel??
This gets you a lot of switches and the meter and usb etc... cheap. I'm not sure about the quality of the switches, but im sure they arent high quality switches. you definitely wont get close to that price getting them individually.
2) do I also need a fuse block and if so, how to wire the fuse block +/- to the various panel switches?
No doubt you can find some help here, but you will need to be more specific with what you are doing with the switches. Everything will depend on what loads the switches are controlling. if its a bunch of small loads you may be able to get away with a system wired like the panel from your post, but likely you should install a fuse block and separate the loads.
try posting a list of everything electrical you want to control with the switches along with any other major loads you have added (winches, etc...) that are not controlled by the switches. that way we can take a look at it and give some clear direction.
just FYI
i definitely recommend
OTRATTW for the switches. excellent products and excellent customer service. (Not cheap though)
i used this fuse block in mine
i used
this switch panel. IMO the cut quality is not great but the price is right.