I have used the same system to trigger my car washes for 25 years and I'm about ready to have them rebuilt again - this time I'm going to try having them made out of stainless steel. The regular steel lasts about 7-8 years with a little shoring up and welding from time to time, so I'm hoping that stainless will last a lot longer. That being said, I'm wondering what else is out there? Can you guys tell me what has worked for you? I know a lot of washes have gone to photo eyes, but our treadle system is so precise and gives the customer such a clear target to hit - plus it's so easy for a customer to stop the car wash if they want to just by pulling off the treadle plate, I'm not sure if I want to try to reinvent the wheel in this case or not.