I have a project to make a new design of 100% draught proof cat flap. I am a retired mechanical engineer and can make all the mechanics but I'm not so good with the electronics. Ideally I am looking for a microchip detection system that still works, but let down by a worn out or broken flap part
I can help remove and refit if you are intending removing such a 'broken' flap, and have a new one to put in .
