Hello PLEASE around HELP, have an older MB100 with a sales flap width 4.40 meters, since I have a bad back problem I need a solution that I can open and close the flap electrically. Who can give me some tips, about which search term can I find such a thing in the net? Or how do you have to calculate this when the flap is 4,40 meters by 1,50 meters tall? Who can please help me, where can you get such a thing? Thanks for the quick help and nice holiday Greetings Achim