Will77

Hi, I ve got an electronics background and am working on a PCB with multi function control of RGB LEDs for red white mainline and shunting activities as the model is so short on space Im probably going to spin my own daughter board which will also fit the HM7000 21 pin. I ve heard alot of people getting frustrated by the lack of keep alives avaible at the moment so was thinking I could add in the adition circuitry to my PCB then disperse the caps throughout the loco as normal. I ve not got a Hornby R7377 so cant take one to pieces to look at the electronics has anyone done so or better has a photo of whats inside it other than the three 2.7V Supercaps? Any help would be much appreciated.