You want to take the switch screws out . The switches should sit on the bead board.
Your dotted line looks good. You can also get over sized covers .

 

The hole should match the size of the box holding the switch or receptacle.

 

It’s trickier than I thought it would be.

the hole is a little big and I don’t need the notches I made for the timer switch, they’re a mistake.

but a standard switch plate will cover it all, so that’s good enough.

Now for the outlet. Took me about four hours to cut this piece so far

 

The switches shouldn't be trapped behind the bead board. You might also consider investing an extra dollar in a new switch.

 

The yokes should be on the surface of the headboard. You can remove power, remove the screws from the box and tilt the devices to allow the panels to be installed. Box extension are needed to cover the combustible surfaces of the beadboard.

 

Sounds good. I’m just putting it up to gauge the hole size.

I’ll swap in the new switch after the board is up. But before nailing up tge panels, im going to paint them all.

the hole is maybe an 1/8” too big at tte top and bottom but the edges of tge extension box still catch the panel. This should work.

took me a lot of trial and error

 

That is why i said take the switch screws out first so they can be moved and paneling goes under switch tabs

 

Remove the original box (hacksaw or multitool) and install an old work box through the paneling which will be the "new" wall.

 

Why go through all that when a box extension is penny's and takes 30 seconds to install?

 

A box extension is way less work than removing the old switches, undoing the splices, cutting out the box, reinstall the cables to the new box, resplices and wire the switches. The cables may be too short to allow the old cables to be put into the work box.

 

Yes I am 100% using an extension box. Much easier for me than moving the box to match a hole I made in the panel.

I’m still basically using trial and error to transpose the position of the outlet box to the panel. It’s a technique but sure is time inefficient.

After I paint all the panels I’ll put them up and at that time I’ll install the extension boxes.

 

Thanks for the input. Every time I do something like this it feels like the first time (it feels like the very first time!).

 

ended up working fine

 

Outlet should be gfci protected.

 

We have them with a GFCI at tge breaker box.