You may remember that I live in Stourbridge. I have a Powerbox if you want to experience the difference.
With regard to opening the doors with windows fitted, I’ve taken an early ideas shared on this site and taken it a step further. Using stainless steel bike brake cable and solderless nipples, I have the following modification
You simply pull the cable to operate the lever, then pull the top of the window away from the body to avoid scratching the paintwork.