I have toyed with the idea of developing one using a micro switch, but decided that it wasn't worth the effort. If I forget to release the brake, I will probably not notice the brake light either. Now a horn would be noticed, but it would be too annoying. It is like having a seat kill switch.... after a few months, you will hate it and disconnect it. Every tractor that I have ever purchased used has always had the safety items removed except for one...... that one was owned by an old man that was very particular that everything worked just like the day it left the factory.... There are words for people like that, but I am not allowed to use them......