flush mounting panels on a brick/block wall

The ones I have bought are these :-

First problem is how flat is the wall? You will need to ensure that the wall mountings are absolutely flat across the wall, packing the plates out if necessary. These plates are near a zero tolerance device. then it's a case of extreme patience getting all the fixings to line up. You might be better off looking for some flat panel versions of these plates, which are more tolerant of location. You're still going to have an alignment problem even then.

What do you mean by 'flat penel versions' ?.

I have tried google and these are all I could find.

There are up to 3 mm hollows and high spots on the walls over the

I mounted an IKEA wardrobe door panel, a similar size to your proposal, as a double bed headboard using clips like that, and it was certainly tricky to find screws that would not foul and still be suitable robust. I think I just rummaged in my collection until I found something that would do.

The wall was evidently not flat, (though I had not previously noticed any significant bow) and the panel stands off a few mm, which is perfectly fine for my installation, but would not suit you.

Chris

You'd be better using one of these "instant grab" glues.

Countersink screws? What is diameter of the holes in the clips?

Do you have access to a router? Various options then of sinking your clips slightly into the wood, or making an internal 'pocket' behind a metal plate 'keyhole' that would surround the head of a wall mounted bolt, or hold a glued in ex-hard drive neodymium magnet.

Similar to

these can be routed to recess them within the panel to make them truly flush ...

Interesting.

But I suspect finding the correct screws to attach the buttons to

The video shows a router being used to rebate the black sections and the buttons fitted to the panel. I would have to fit the buttons to the wall (with the problem of accurate drilling and rebate the panel making the choice of screw even more difficult.

Fitting the buttons to the panel and leaving them to stand out 6 mm would be ok.

Unless I can find somewhere that sells them in small quantities though, it will have to carry on with those screwfix fittings.

There is an SDS trade centre at Weir road Wimbledon that sells these. Has anyone bought anything there ?. Do they sell to the public ?.

The about page of their website says

"SDS has been supplying architectural ironmongery to the trade and public from our showrooms in Battersea for over twenty-five years [...] Our new warehouse at 20 Weir Road, Wimbledon, SW19 8UG. All click to collect orders are to be collected from our warehouse."