Quote from Will_S on September 4, 2023, 12:58 am

Hi Folks, another "If only I'd known" moment:

When you order Rons CDU (if you haven’t, you should!) do be mindful of the 5” screens you get for them. It appears there are those where the screen and its  PCB board  are separate, joined only by the flat ribbon cable between screen and PCB, and those where the two pieces are attached permanently, stuck together back to back with a thin foam filler. For ease of installation, I recommend the 2 separate piece version. I got the “attached” version, which made the installation process slightly more involved!

With the ‘separate’ PCB the screen sits nicely in the front pocket of the CDU backer piece with a good friction fit, you attach Rons PCB mount plate and mounting the PCB is easy. Job done.

With the ‘attached’ variety the screen fits the cutout perfectly but the PCB behind it does not, it’s a couple of mm larger all around.  Not only that but the recess is cut to take just the screen, not the PCB so even if you remove the very slight oversize of the PCB it will not sit flush with the face of the backer due to the flanges which hold the screen at the correct depth

My first atempt to adapt the CDU was by milling off the raised screen mounting rails from the backer, with my cnc in manual mode – using the jog buttons.

I then found that I had to create a 2.8mm thick packing piece to make the front of the screen flush with the front of the backer.  I then made a “U” shaped piece from 3mm material to hold it all in place from the back with two M2.5 x 10mm screws in diagonal corners.

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For the second one, I had another 'moment' when realized that the mounting rails are about 2.8mm high, so on this one I just milled off the depth stop flanges leaving the bulk of the mounting rail in place.

The recess at the bottom(left side of photos) are for cable relief for the interconnect between screen and PCB.

The screen slipped nicely into place. The oversize of the PCB set the correct depth resting on the mounting rail. Hold it in place with a “U” and two ,more M2.5 screws.

Both ideas did the required job. It just would've been easier if got screens with separate PCB's!