I need some advice on installing my restrictor....not sure I even like it but called around to radio shops to see if they can install it and looks like they charge around $100...does that seem reasonable? Is it best to just have it hooked up to the brakes with an on and off switch? I'm wondering if it can be annoying when you are driving, having it on all the time? I bought it in Texas and they said it is about a 30 minute job to install....but I'm thinking that does not have an on and off switch. Called ABC Warehouse and Best Buy and they offered to look at it....any suggestions?