Hello,
Almost 2 weeks went by since my previous post, and I'm happy to announce that progress was made.
Firstly, I've been able to refine the process required to separate the LCD from the glass, without damaging the glass ( nor the LCD actually ). I used a hot air station blowing on the LCD until the LCD reaches about 100°C, at which point the glue was soft enough to allow the LCD to be slid along the glass. This does absolutely no damage to the nice black frame on the glass, as seen on the picture below :

Also, I've been testing the new PCB as much as possible, and found only minor issues, which will all be corrected in the next iteration. One of this issue was silly me forgetting that at least 1 wire is required, to provide direct positive battery supply to my PCB. Others issues mostly revolve around some transient glitches hapenning when power cycling the display, also resolved by adding some capacitors here and there.

But the main takeway was the new installation method, where my PCB is soldered directly to the Beolink top PCB, is working very well, and is quite easy to do, so huge success on that side ! It requires careful alignment of the 2 PCBs, (so that pads on my PCB lines up perfectly with pads on the Beolink PCB underneath), then flowing solder through the holes on my PCB.

I also added some debugging facilities to help me diagnose potential installation issues. A new startup screen was added, that only shows up after changing the batteries. This screen shows the current software version of the mod ( it's a 7 character number ), that will allow me to identify which software version in running on your board. I also added a small LED that lights up when my board is running, so that a dead board can be easily identified from a dead display. ( See if you can find the component with the "BUSY" marking on the following picture ).

Last but not least, I am now taking orders for this kit !
My goal is to see if we can reach 20 orders, then the price point of 50€ / kit ( shipping excluded ) gets manageable. Lower order count can still be fulfilled, but the price per kit will need to be higher. Kit includes 1 assembled PCB, 1 red wire, and 1 "Cradle" part for the display. Note that installing the kit requires soldering skills, with the hardest part being to cleanly desolder the original display controller IC and its 3 logic buffers from the Beolink PCB. Second hardest part is separating the glass from the LCD. The installation also requires some double sided adhesive tape, but I am sure that is less of an issue.
If you are interested in buying one or several of these kits, simply answer this post, and specify how many kits you are planning to buy. I'll then be able to estimate the total number of kits to be produce, and therefore the pricing.
You can also contact me if you want me to perform the installation on your remote.
Now waiting for your replies 🙂